Respuesta :

lindsayest
Answer

#8 is 17.7

Explanation:
13^2+12^2 = c^2
C = 17.7
Leafleey

Hello,

If you have noticed they are all right angles, which means you can use  Pythagorean theorm.

1. a^2 = 40^2 + 9^2

= a^2 + 1600 + 81

= 1681

a^2 = 1681

sovle for "a"

a = 41

hope this helps.

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