Question

determine o valor dos ângulos indicados nas figuras: ​

Answer 1

a)

$y = \frac{40}{2} = 20 \\ x = \frac{70}{2} = 35$

b)

$y = \frac{140}{2} = 70 \\ x = \frac{110}{2} = 55$

c)

$x = \frac{100}{2} = 50$

d)

$2x - 50 = \frac{160}{2} \\ 2x - 50 = 80 \\ 2x = 80 + 50 \\ 2x = 130$

$x = \frac{130}{2} \\ x = 65$