Polygons

[snow terrace]

i dont get how y*2 = 2 x area/sin()

[bleak parcel]

Find interior angle for a heptagon

Then substitute in formula

[snow terrace]

what formula?

[light badger]

Why don’t you do (n-2) x 180

12.8 is what I got

[snow terrace]

you mean 128.6?

and i get that part

[bleak parcel]

Bro the sine rule

Yeah ur finished

[light badger]

I used cosine rule

[snow terrace]

nvm

i get it now

i was being an idiot

[bleak parcel]

Yeah but they tell u the area and I think about sine straight away

[snow terrace]

i didnt see the 1/2 ab sin c part

and had skipped that

[light badger]

Oof

[snow terrace]

that was such a easy question i should egt some rest lol

[snow terrace]

i was just tired mb

[snow terrace]

15.8 the answer right?

[light badger]

12.8

[snow terrace]

are u sure?

i tried it again and i am pretty sure its 15.8

[light badger]

That’s what I got

What did you do

The working out

[snow terrace]

first i found the y as seen in the image

then using cosine rule i found the legth of GB

[light badger]

Did you get 108 for the angle part ?

1/2 x^2 sin108 =30

Then finding the x

Then you have the lengths and use cosine rule

[snow terrace]

its 900/7 which is 128.5714286

[light badger]

That’s the exterior

We want to find the interior

[snow terrace]

becuase (7-2) x 180 = 900
which divided by 7 is 900/7

[light badger]

Oh crap

Then 15.8 is the correct answer

[snow terrace]

yh

[light badger]

I got confused with heptagon and pentagon

😭

But yh you know how to do it

[snow terrace]

it happens to everyone we both got confused bro for the dumbest things

[light badger]

Last year I got an 8 in maths

[snow terrace]

but we both know how to do it

[snow terrace]

wow nice

[light badger]

Now I’m doing maths, futher maths and eco

[snow terrace]

i wanted to do further maths but my school dosent have it

[light badger]

Oof

Good luck with the exam tho, you got this

[snow terrace]

i love maths and physics so much

[snow terrace]

thx i should keep revising lol

[light badger]

Same but for me I prefer a little bit eco over physics

[snow terrace]

fair

[light badger]

[snow terrace]

heres a gift from me this me to u (its kinda simpler ngl)

i got 7.14

[light badger]

You do the same thing but you can only use 1/2 ab sin c

[light badger]

Ok