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Answer 1

Answer:

2. Let the no.-x

180-102=72°

Step-by-step explanation:

because half circle is 180° so we subtract it

Answer 2

Step-by-step explanation:

1. it is clearly seen that the angle is 90°

• ie x+ 63°= 90

solving this further:

x + 63°=90°

x= 90°-63°

x= 27°

2. we can clearly see that it is a linear pair or we can say it is a straight angle ie x+ 102°= 180

solving this further :

x+102°=180°

x=180°-102°

x=78°