Question

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Answer 1

Resposta:

a)

x=180°-50°-30°

x=180°-80°

x=100°

b)

3x=180°

x=180°/3

x=60°

c)

2x=180°-70°

2x=110°

x=110°/2

x=55°

d)

x=180°-90°-15°

x=180°-105°

x=75°

7.

A=5²

A=25m²

P=5*4

P=20m