Question

Ans (i) 30° (ii) 117° (iii) 45° (iv) 22.5°​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

yes

all the answers are correct

(i)90-60=30°

(ii)180-63=117°

(iii)180-90=2a

a=90/2=45°

(iv)3a+2a+3a=180°

8a=180

a=180/8

a=22.5°