Question

calcule as medidas dos ângulos dos triângulos

Answer 1

Ola Becky

a) 

x + 2x + 3x = 180 
6x = 180
x = 180/6 = 30

a = x = 30°
b = 2x = 60°
c = 3x = 90° 

b)

x + x + 30 + 60 = 180 
2x = 180 - 90 = 90
x = 90/2 = 45

a = x = 45
b = x + 30 = 75
c = 60 

c)

x + x + 20 + 2x = 180
4x + 20 = 180
4x = 180 - 20 = 160
x = 40 

a = x = 40°
b = x + 20 + 60°
c = 2x = 80° 

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