Geometry (proving a triangle is a isosceles) | Mathematics | Page 1

rustic light Mar 22, 2025, 10:54 PM

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This is a short homework

vale plinthBOT Mar 22, 2025, 10:54 PM

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rustic light This is a short homework

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rustic light Mar 22, 2025, 10:55 PM

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kind pelican Mar 22, 2025, 10:57 PM

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rustic light

well recall the properties of an isosceles triangle and think how to prove atleast one of them

rustic light Mar 22, 2025, 10:57 PM

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it when

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2 sides are equel

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i think you use the distance formula

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help

kind pelican Mar 22, 2025, 11:00 PM

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yeah that is a one way to get around it

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if given the coordinates here, you can use your method

rustic light Mar 22, 2025, 11:08 PM

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yeah tehres cords

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#

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A (2,2)
B(-1,2)
C(5,-2)

kind pelican Mar 22, 2025, 11:09 PM

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yeah as previously mentioned before, your method will work here

rustic light Mar 22, 2025, 11:09 PM

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alr

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so

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imagine i get the answwer

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after I use the distant formula

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then what

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i get a number

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how does that say the triangle is isoclese

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and what cordinates would I use

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b and c?

kind pelican Mar 22, 2025, 11:12 PM

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look, If you have a triangle
AB=6 unit length ,BC=6, AC=7

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how do you know that this is an iso triangle, according to what you ve said before.

rustic light Mar 22, 2025, 11:20 PM

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i see

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i do the distence formula on AB

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then do it again on AC

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and if their equel

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that means there a iscocles triangle

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right?

kind pelican Mar 22, 2025, 11:24 PM

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you are half way through the solution

kind pelican Mar 22, 2025, 11:25 PM

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kind pelican look, If you have a triangle AB=6 unit length ,BC=6, AC=7

if I didnt give you information about the third side, would you be able to determine exactly the triangle type?

rustic light Mar 22, 2025, 11:27 PM

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?

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YEAH

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yeah no caps

kind pelican Mar 22, 2025, 11:28 PM

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NO , you still have a possibility that this is an equilateral triangle

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so you need the three side to determine the triangle type

rustic light Mar 22, 2025, 11:30 PM

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i mean

rustic light Mar 22, 2025, 11:30 PM

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kind pelican look, If you have a triangle AB=6 unit length ,BC=6, AC=7

its coz I already knew this

kind pelican Mar 22, 2025, 11:31 PM

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suppose that I didnt give you the third

rustic light Mar 22, 2025, 11:31 PM

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yeah

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i wouldnt know

kind pelican Mar 22, 2025, 11:32 PM

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so what do you have to do in your problem?

rustic light Mar 22, 2025, 11:33 PM

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distance formula

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for ab

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i got 7

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now im gon do ac

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actually wait

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nvm not 7

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forgot to squarea

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its 25

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im smart

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i solved for ac

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annd got 25

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YEs

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THEIR EQUEL

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NOW ILL HAVE A 39 ISNTEAD OF 35

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IN MATH

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alr bro

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how do i know that this ugly ass triangle is a right angle or not

kind pelican Mar 22, 2025, 11:38 PM

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did you calculate bc?

rustic light Mar 22, 2025, 11:38 PM

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yeah

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im fast

kind pelican Mar 22, 2025, 11:38 PM

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good

rustic light Mar 22, 2025, 11:38 PM

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thanks

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so how do I know if this shitty ahh triangle is a right triangle or not

kind pelican Mar 22, 2025, 11:40 PM

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rustic light how do i know that this ugly ass triangle is a right angle or not

Actually there are several ways, can you recall any fundamental properties of any right triangle?

rustic light Mar 22, 2025, 11:41 PM

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y = mx+b?

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yeah bro im clueless

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ahhhh

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A square + b square

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= c SQUARE

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right?

kind pelican Mar 22, 2025, 11:42 PM

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rustic light y = mx+b?

that is an equation of straight line, what does this even relate to?

rustic light Mar 22, 2025, 11:42 PM

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slope

kind pelican Mar 22, 2025, 11:42 PM

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rustic light right?

yeah that is a one way around, did you study vectors?

rustic light Mar 22, 2025, 11:43 PM

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whos vector

kind pelican Mar 22, 2025, 11:43 PM

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never mind

kind pelican Mar 22, 2025, 11:43 PM

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rustic light right?

try this

rustic light Mar 22, 2025, 11:43 PM

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k

rustic light Mar 23, 2025, 12:39 AM

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yo

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I did pythagream theoresm

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and got 72=44

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that means its not a right trangle right?

indigo cedar Mar 23, 2025, 1:27 AM

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rustic light and got 72=44

what lengths did you calculate?

kind pelican Mar 23, 2025, 1:36 AM

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rustic light that means its not a right trangle right?

how did you calculate

dry elk Mar 23, 2025, 1:36 AM

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kind pelican NO , you still have a possibility that this is an equilateral triangle

equilateral triangles are still isosceles…?

kind pelican Mar 23, 2025, 1:38 AM

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dry elk equilateral triangles are still isosceles…?

Well yes, but you have to get the 3 sides to precisely determine the triangle type. This is what I mean here.

opaque escarp Mar 23, 2025, 2:15 AM

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@rustic light still need help?

rustic light Mar 23, 2025, 6:09 PM

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yeah

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How do I prove its a right triangle?

opaque escarp Mar 23, 2025, 6:19 PM

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rustic light How do I prove its a right triangle?

AB and AC should be perpendicular

rustic light Mar 23, 2025, 6:19 PM

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alr im gon sound dumb

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but

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whats perpendicular

opaque escarp Mar 23, 2025, 6:24 PM

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rustic light whats perpendicular

two lines make an angle of 90 degrees with each other

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you can also use distance formula and prove it with pythagorean theorem if you want

rustic light Mar 23, 2025, 6:25 PM

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how

opaque escarp Mar 23, 2025, 6:26 PM

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rustic light how

every right triangle satisfies the pythagorean theorem

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this is known as the converse of pythag

rustic light Mar 23, 2025, 6:30 PM

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well

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I know its not a right triangle

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but i gotta prove it anyway

opaque escarp Mar 23, 2025, 6:32 PM

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rustic light but i gotta prove it anyway

so then show the sides are not perpendicular

rustic light Mar 23, 2025, 6:32 PM

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how

opaque escarp Mar 23, 2025, 6:32 PM

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particularly AB and AC

opaque escarp Mar 23, 2025, 6:32 PM

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rustic light how

calculate their slopes

rustic light Mar 23, 2025, 6:32 PM

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4 up 3 right

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or 3 left 4 down

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for ab

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3 right 4 down for ac

opaque escarp Mar 23, 2025, 6:33 PM

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if a line has slope $m$, the perpendicular slope, denoted $m^{\perp}$, satisfies $m^{\perp}=-\frac1m$

quiet rainBOT Mar 23, 2025, 6:33 PM

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ooaa

opaque escarp Mar 23, 2025, 6:33 PM

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i gotta eat

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ill brb

opaque escarp Mar 23, 2025, 7:00 PM

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back

rustic light Mar 23, 2025, 11:07 PM

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yo

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i need help

opaque escarp Mar 23, 2025, 11:17 PM

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rustic light i need help

ok

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with?

static otterBOT Mar 25, 2025, 12:00 AM

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@rustic light

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eternal wraith Mar 25, 2025, 8:14 AM

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kind pelican NO , you still have a possibility that this is an equilateral triangle

Equilateral triangles are a subgroup of isoceles triangles

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Proving two sides are equal is enough

#Geometry (proving a triangle is a isosceles)