Question

can ssomeone explain to me what to do??

If m∠B = 52 and m∠ECD = 63, what is the measure of ∠ACB?

http://secure.starssuite.com/files/Geo2010/Geom_05S_Fig06.jpg

Answer 1

We know the internal angles of a triangle add up to 180....and we have 2 angles, what will be the third?

Answer 2

wouldn't it still be 63?

Answer 3

Well lets see

\[\large <A + <B + <C = 180\]
\[\large 63 + 52 + <C = 180\]
\[\large 115 + <C = 180\]
\[\large <C = 180 - 115\]
\[\large <C = ?\]

Answer 4

so 65?

Answer 5

Correct

Answer 6

woo! thank you so much!!