A geometry problem by 灻災 土

Geometry Level 2

144


The answer is 144.

灻災 土 by 灻災 土 , 22, Hong Kong

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2 solutions

Michael Mendrin
Feb 14, 2017

Look at the bottom left corner, right below F i n d . . . Find... , where it says 144.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

I am still shocked that only 90% of the people go this right

Razzi Masroor - 4 years, 3 months ago
灻災 土
Feb 14, 2017

angle FDC=108 degrees (int.angle, CG parallel to DF) angle EDI = 72 degrees (corr. angle, EH parallrl to DI) angle IDC=108-72=36 degrees angle AID = 180-36=144 degrees (int. angle, AI parallel to BD)

0 Helpful 0 Interesting 0 Brilliant 0 Confused

Could you get rid of the 144 on the question please? It helps with getting the answer right a lot!

Freddie Hand - 4 years, 3 months ago

Lol! You gave away the answer!

Kok Hao - 4 years, 3 months ago

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