Question

Por Favor me ajude na questão 20.

Answer 1

a/b=4/3

BD=10 cm

a=4b/3

(BD)²=a²+b²

(BD)²=(4b/3)²+b²

10²=16b²/9+b²

900=16b²+9b²

900=25b²

36=b²

b=√36

b=6 cm

a=4/3(6)

a=24/3

a=8 cm

Resposta: a=8 cm e  b=6 cm