Suppose a triangle has sides a, b, and c, and the angle opposite the side of length a is acute. What must be true? A. b^2 + c^2 c^2 D. b^2 + c^2 a^2 ***My answer: D is that right? :)

Question

Suppose a triangle has sides a, b, and c, and the angle opposite the side of length a is acute. What must be true? 

A.       b^2 + c^2 < a^2

B.       a^2 + b^2 = c^2

C.       a^2 + b^2 > c^2

D.       b^2 + c^2 > a^2

***My answer: D

is that right? :)

jim_thompson5910 · Answer

you are correct

keep in mind that you need to show that all 3 angles A, B, and C are acute to prove this is an acute triangle, but this bit of info is irrelevant in this case

anonymous · Answer

haha okay :) i'll keep that in mind!! :)

thanks!! :D