Question

1 Quantos graus mede o arco ABC? 5x + 20° 160° - X o В 10x + 40°​

Answer 1

Vamos là.

5x + 20 + 160 - x = 2*(10x + 40)

4x + 180 = 20x + 80

16x = 100

x = 100/16 = 25/4

Arco

A = 4x + 180 = 25 + 180 = 205°