Question

Preciso de ajuda e geometria

Answer 1

a)5x+x=90°
6x=90
x=90/6
x=15°

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

c)2x+x-15=90
3x=90+15
3x=105
x=105/3
x=35°

d)x+x+10=90
2x=90-10
2x=80
x=80/2
x=40°