this makes no sense | Mathematics | Page 1

proper nestBOT May 15, 2024, 6:14 PM

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stiff pendant May 15, 2024, 6:14 PM

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i need help with all of it

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crystal glen May 15, 2024, 6:17 PM

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stiff pendant

Do you know how much the angles at a point add up to?

stiff pendant May 15, 2024, 6:17 PM

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180

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or 360 idk

crystal glen May 15, 2024, 6:17 PM

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Well look up "angles at a point"

stiff pendant May 15, 2024, 6:18 PM

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its 360

crystal glen May 15, 2024, 6:18 PM

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Nice, what about the sum of interior angles of a polygon?

stiff pendant May 15, 2024, 6:18 PM

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i dont know

crystal glen May 15, 2024, 6:19 PM

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As above, let's look it up

stiff pendant May 15, 2024, 6:19 PM

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Ok

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(n - 2) x 180

crystal glen May 15, 2024, 6:20 PM

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What is that n?

stiff pendant May 15, 2024, 6:20 PM

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180?

crystal glen May 15, 2024, 6:21 PM

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The information source from which you get this formula should have stated what n means

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Can you get that info for me?

stiff pendant May 15, 2024, 6:21 PM

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n is the number of sides

crystal glen May 15, 2024, 6:21 PM

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Good

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How many sides does our polygon have?

stiff pendant May 15, 2024, 6:21 PM

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4

crystal glen May 15, 2024, 6:22 PM

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So its interior angles add up to?

stiff pendant May 15, 2024, 6:22 PM

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180

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no

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360

crystal glen May 15, 2024, 6:23 PM

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We already have 3 of the 4 interior angles

stiff pendant May 15, 2024, 6:23 PM

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ok

crystal glen May 15, 2024, 6:23 PM

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2 of which are expressed in terms of x

stiff pendant May 15, 2024, 6:23 PM

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yes

crystal glen May 15, 2024, 6:26 PM

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The last one, along with another angle of known size (also in terms of x), forms a whole circle around a point

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How much do they add up to?

stiff pendant May 15, 2024, 6:26 PM

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360

crystal glen May 15, 2024, 6:27 PM

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Very good

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So we know that reflex angle as well

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in terms of x

stiff pendant May 15, 2024, 6:27 PM

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yes

crystal glen May 15, 2024, 6:29 PM

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The four interior angles add up to 360 degrees

stiff pendant May 15, 2024, 6:29 PM

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ok

crystal glen May 15, 2024, 6:29 PM

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So we are done

stiff pendant May 15, 2024, 6:30 PM

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what do i do now

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is the answer 80?

crystal glen May 15, 2024, 6:31 PM

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Doesn't seem like it

stiff pendant May 15, 2024, 6:31 PM

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ok

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i did 360 - 40 = 320 then divided by the 4x missing

crystal glen May 15, 2024, 6:32 PM

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stiff pendant i did 360 - 40 = 320 then divided by the 4x missing

The reflex angle is not x degrees

stiff pendant May 15, 2024, 6:32 PM

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ok

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its 260 ?

crystal glen May 15, 2024, 6:33 PM

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Its sum with (x + 100) degrees is 360 degrees

stiff pendant May 15, 2024, 6:33 PM

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so i do opposite x - 100?

quasi hearth May 15, 2024, 6:35 PM

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Solve it now remembering the interior angles add upto 360

Screenshot_2024-05-16-00-03-43-44_572064f74bd5f9fa804b05334aa4f912.jpg

stiff pendant May 15, 2024, 6:35 PM

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is the equation 3x + 40 + 260 - x?

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then i get x

quasi hearth May 15, 2024, 6:36 PM

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stiff pendant is the equation 3x + 40 + 260 - x?

Yes

stiff pendant May 15, 2024, 6:36 PM

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ok

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its 150 then?

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or do i do something with the 150?

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im so confused

crystal glen May 15, 2024, 6:39 PM

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stiff pendant is the equation 3x + 40 + 260 - x?

This is not an equation, I don't see two quantities being set to equal each other

stiff pendant May 15, 2024, 6:40 PM

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well i thought that was the right equation as potatto said so i added the x in the shape 3x and then the x with the 260 - x and the + 40 so i thought that was the equation

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i just dont know

crystal glen May 15, 2024, 6:41 PM

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It works as one side of an equation

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We need the other side

stiff pendant May 15, 2024, 6:41 PM

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ok

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other side is 260 - x no?

crystal glen May 15, 2024, 6:43 PM

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No, what does 3x + 40 + 260 - x mean in the context of the picture?

stiff pendant May 15, 2024, 6:44 PM

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40 is already a given angle the 2x plus the x on the opposite side 3x then the 260 is from the x + 100 and the opposite is x - 100 but i have no clue

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ive already spent 1h on this question im lost

crystal glen May 15, 2024, 6:48 PM

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The 260 is not standalone

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The bottom (reflex) interior angle is of size 260 - x degrees

stiff pendant May 15, 2024, 6:48 PM

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ok

crystal glen May 15, 2024, 6:48 PM

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3x + 40 + 260 - x
This is the sum of the degrees of all 4 interior angles

stiff pendant May 15, 2024, 6:48 PM

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ok

crystal glen May 15, 2024, 6:48 PM

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We have discussed what this sum is...

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What is its value?

stiff pendant May 15, 2024, 6:49 PM

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360

crystal glen May 15, 2024, 6:49 PM

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There you go

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Set up an equation and solve for x

stiff pendant May 15, 2024, 6:49 PM

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ill try

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3x +300 - x ?

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or to 2x + 300 = 360?

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is x 60 then

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x is 30

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yay

#this makes no sense