Question

I need help can you solve this?

Answer 1

Hypotenuse of small triangle:
9^2 - 7^2
= 81-49 =32
Sqrt(32)

base of small triangle:
(sqrt(32))^2 - 2^2

multiply the same surd gives the number under the root

so, 32-4
= 28
Final: sqrt(28)