Question

calcule x, sabendo que os ângulos são completares

Answer 1

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Answer 2

a)x + 18 + x = 90
2 x + 18 = 90
2 x = 90 - 18
2 x = 72
x = 72/2
x = 36°

b)x + 15 + 2 x = 90
3 x + 15 = 90
3 x = 90 - 15
3 x = 75
x = 75/3
x = 25°

c)x/2 + 15 + 3 x - 23 = 90 
m.m.c. = 2
x/2 + 30/2 + 6 x/2 - 46/2 = 180/2 eliminar o denominador
x + 30 + 6 x - 46 = 180
7 x - 16 = 180
7 x = 180 + 16
7 x = 196
x = 196/7
x = 28°