Question

Me ajuda nessa numero 13

Answer 1

a
20 + x + 40 = 90
60 + x = 90
x = 90 - 60
x = 30 graus ****
b
x + 6 + x = 90
2x = 90 - 6
2x = 84
x = 84/2 = 42 graus ****
c
4x + 4x + x + 90 = 360
9x = 360 - 90
9x = 270
x = 270/9 = 30 graus ***
d
60 + x + 80 = 180
140 + x = 180
x = 180 - 140
x = 40 graus ***
e
12x + 10 + 5X = 180
17X = 180 - 10
17X = 170
X = 170/17  = 10 GRAUS ***
f
x + 2x + 126 = 180
3x = 180 - 126
3x = 54
x = 54/3 =18 graus ***