Question

Calcule a medida x, em graus de cada polígono.

Answer 1

a) 9/10x + 7/10x + x + x = 360°
9/10x + 7/10x + 2x = 360
9/10x + 7/10x + 20/10x = 360
36/10x = 360
x = 100°

b) x + 8/3x + x/3 = 180°
3/3x + 8/3x + 1/3x = 180
12/3x = 180
x = 45°

c) x + 2x + 2x + x + 2x + 2x = 720°
10x = 720
x = 72°

Answer 2

questão d:       540 é o valor dos triângulos internos do polígono

x+13x/8+2x+3x/4+11x/8=540                           obs: mmc de 8,4,8: 8

x/8+13x/8+2x/8+3x/8+11x/8=540

54x/8=540

54x=540.8

x=4320/54

x=80