Find the ?

[bleak ingot]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

4. Feel free to nominate the person for helper of the week in #helper-nominations
5. Do not ping the mods, unless someone is breaking the rules.
6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[nova meteor]

yuck geometry sucks

if I knew this I would help u but I'm learning the same thing rn

[amber jewel]

ts hard asf bro

[nova meteor]

real

it's like 10 steps to find one angle

[brittle roost]

Use the fact that ABE is isoceles
Then prove that BEDC is a cyclic quadrilateral (one pair of opposite angles add up to 180)
Then some elementary circle theorems to show that angle EBD = ECD

[uncut mango]

WAIT IK THIS

THERES A CIRCLE THEOREM FOR BOWTIE SHAPES

[uncut mango]

angle EBD = ECD

as well as angle CED = BDC

well this is actually rlly confusing

[uncut mango]

it gives no clues

like if triangle EAB is a right angle

[uncut mango]

but it doesnt mention tho....

@amber jewel can you send a full photo? i think you mightve sent just a snippet of the text

normally i think this is imposible unles EAB is a. right angle or isoceles

@cedar lagoon is there something im missing out on?

pls help

[cedar lagoon]

Sorry, geometry is a bit too hard for me in this temperature.

[uncut mango]

thats ok

im as confused as when my teacher calls 10* an obtuse angle o-o

[cedar lagoon]

If it helps, I can try making a more accurate picture in Kompas.

Maybe that'll help.

Not sure if I can, though.

[uncut mango]

i think the problem is that it doesnt hace enough data

about any of the shapes

[cedar lagoon]

Yeah, that might also be the case.

I think you might be right that Wizard hasn't sent the full picture.

[brittle roost]

Actually it does lmfao

[brittle roost]

It has enough info

The answer is 66 lmfao

BEDC is a cyclic quad

[cedar lagoon]

How do you know?

[brittle roost]

So just draw a circle that goes through the points B E D C

and then from the circle theorems

EBD = ECD

[cedar lagoon]

Ah, wait, I see it.

Ohh, I see.

[brittle roost]

as they are both angles formed on the edge of the circle and with the same chord (i need a picture for a proper explanation uhh)

[brittle roost]

Yeah somehow I saw it

[cedar lagoon]

Geometry moment

Ah, and I know why I couldn't see it.

[brittle roost]

I usually die when I see geom lmfao
Then i pull out desmos

[brittle roost]

Yeah?

[cedar lagoon]

As usual, I tried to generalize this with arbitrary angles, but that doesn't work here.

If the angles are arbitrary, then this is impossible.

[brittle roost]

Hahahaha

[uncut mango]

OH SHI-

lmfaoooo

[cedar lagoon]

The point here is that there is actually a degree of freedom, I believe, but it won't matter.

[uncut mango]

i literally thought that cuz it looked like a bowtie from one of the cticle yheotems

[cedar lagoon]

Bowtie?

[uncut mango]

same segment theorem

[cedar lagoon]

Oh, a self-intersecting quadrilateral, alright.

I don't think I've ever looked at it that way, to be honest. I just see two angles.

[uncut mango]

my goofy ass thought that it was easier to remember lmfao

[uncut mango]

DESMOS FOR THE W🗣️🗣️🗣️🗣️

[cedar lagoon]

Why Desmos?

If I want to measure angles, I'd use a CAD software, like Kompas.

[uncut mango]

best free graphing calc

[cedar lagoon]

Well, I like Geogebra more, but that's not what I'm asking.

[uncut mango]

Ohhhhhh

to be fair desmos was the first graphing calculator i used and was reccomended by my teacher

and its really accessible in my opinion

[cedar lagoon]

Again, not what I'm asking.

[uncut mango]

?

[cedar lagoon]

I'm asking why you would use a graphing calculator instead of CAD software.

This is a geometry problem, after all, not an algebra one.

[uncut mango]

isnt cad software also used for 3d printing

or am i thinking something else

[uncut mango]

true, however desmos also has a geometry function

[cedar lagoon]

Oh, that.

[uncut mango]

im so dumb i shouldve put the shape in desmos instead of assuming 😭😭😭

[cedar lagoon]

Well, so does Geogebra, but I prefer using CAD software for stuff like this. It's more precise.

[uncut mango]

i havent used any other software, do you need to have a subscription?

and how does it work?

Id love to try it out

[cedar lagoon]

Kompas's full version is paid, but there's also a free version with somewhat less functionality. I believe it's only in Russian, though.

[uncut mango]

rip i barely understand russian

[cedar lagoon]

Well, there's probably other software available.

[uncut mango]

true

WOAH THIS IS SO COOL

[cedar lagoon]

What is?

[uncut mango]

geogebra

the ui is so easy on the eyes

[cedar lagoon]

Oh, ok.

Well, I just dislike that Desmos has mostly always existed without an app.

I believe there is one now, but without 3D graphs.

[brittle roost]

Because i’ve never used geogebra

[uncut mango]

true frrr

[brittle roost]

And well it takes more time on desmos buttt

Worth it for the free algebra practice

[uncut mango]

To be fair tho youd probably be using your computer/pc for these sort of things

and its compatible with tablets as well

[cedar lagoon]

Again, look above to see that it's not what I meant.

[uncut mango]

OHHHHHHHHH

[cedar lagoon]

Anways, if you want to discuss this further, let's move to #geonosidan-prison-complex .

[uncut mango]

true