Question

What are the answers choices for these three questions

Answer 1

Fig.1 20

Fig.2 45

Fig.3 115

Explanation:

Fig.1

ABC+CBD=57

CBD+17+CBD=57

=> CBD = 20

Fig.2

By observing only: 2x = 90

Then x = 45

Fig.3

x+x+50=180

=>x=65

=> Angle 4 = Angle 3 = 180-65=115

Answer 2

1) 37

2) 60

3)115

Explanation: