Question

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Answer 1

Răspuns:

a)x+2x=90°

3x=90°

x=90°:3

x=30

b) x+1/8x=90°

9/8x=90°

x=90°:9/8

x=10°*8

x=80

c)x+(x20°)=90°

x+x+20°=90°

2x70°:2

x=35°

d)x+(x-40°)=90°

x+x-40°=90°

2x=130

x=130°:2

x=65°