Respuesta :

duskism

Answer: 21.8

Step-by-step explanation:

Pythagorean Theorem = a^2 + b^2 = c^2

5^2 + b^2 = 10^2

25 + b^2 = 100

b^2 = 75

b = 8.7

area = 1/2bh

1/2 5x8.7

1/2 43.5

21.8