Question

I need help with these problems please help

Answer 1

1st triangle : c = 29

Explanation:

a^2 + b^2 = c^2

20^2 + 21^2 = c^2

400 + 441 = c^2

841= c^2

find square root of both to eliminate exponent.

c= 29

a = 20

b = 21

c= ?