Question

considere o triangulo abc da figura, determine as medidas a e b indicada

Answer 1

tg60°= 12 · raiz3 / B
raiz3 = 12raiz3 / B
1 = 12/B
B = 12

cos60° = B / a
1/2 = 12/a
12 · 2 = a · 1
a = 24