Question

determine a medida dos ângulos indicados:

Answer 1

(quadrilátero)

x+105+96+87=360
x=360-105-96-87
x=360-288
x=72°

(retângulo)

5x+3+12x+2+90=180
17x+95=180
17x=180-95
17x=85
x=85/17
×=5°

5x+3=5.5+3=28°
12x+2=12.5+2=62°

62+y=90
y=28°