Question

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Answer 1

Explicación paso a paso:

a)

56 + 90 + x = 180

146 + x = 180

x = 180 - 146

x = 34°

b)

x + x + θ + x - θ + x + 40 = 180

4x + 40 = 180

4x = 180 - 40

4x = 140

x = 140/4

x = 35°