Question

Quero com a conta por favor

Answer 1

Resposta:

a)

si=(n-2)×180°

si=(4-2)×180°

si=2×180°

si=360°

x+x+30+x+20+x+10=360

x+x+x+x=360-30-20-10

4x=360-60

4x=300

x=300/4

x=75°

x+30°=

75°+30°= 105°

x+20°=

75°+20°=95°

x+10°=

75°+10°=85°

b) si=(n-2)×180

si=(6-2)×180

si=4×180

si=720°

x+x+20+x+30+130+120+150=720

x+x+x=720-20-30-130-120-150

3x= 720-450

3x=270

x=270/3

x=90°

x+20=

90+20=110°

x+30=

90+30=120°

c) si=(n-2)×180

si=(5-2)×180

si=3×180

si=540°

x+x+10+90+2x-30+90=540

x+x+2x=540-10-90-90+30

4x=540-190+30

4x=540-160

4x=380

x=95°

E= x+10=

95+10=105°

A=95°

B=90°

C= 2x-30=

2×95-30

190-30= 160°

D= 90°

espero ter ajudado