Question

Please help! I really need it!

Answer 1

C : 4√2

Explanation:

An triangle has two sides of equal right angles

We call the perpendicular side a, the isosceles triangle FGD at G

According to the Pythagorean Theorem

FH = √FG² + GH² = √a²+ a² => a√2 = 8

⇒a = 4√2