Question

Calcule X e determine o valor dos ângulos adjacentes A e B:

a)105 e 75
b)100 e 80
c)160 e 20
d)90 e 90

Answer 1

( x - 30 ) + ( 3x + 10 ) = 180

x - 30 + 3x + 10 =180

4x - 20 = 180

4x = 180 + 20

4x = 200

x = 200/4 = 50 ****

x - 30 = 50 - 30 = 20 graus ****

3x + 10 = 3 ( 50 ) + 10 = 150 + 10 = 160 **** ( c )