Sir/Ma'am please solve the question's
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The answer is 40 +40 =80 +100=180 is the answer
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2) angle subtended by the diameter of the semi circle is 90° => option (3)
3) angle AOB = 2 × 40° => 80°
in ∆ AOB, OA = OB [ radii ]
therefore AOB + OAB + OBA = 180°
80° + 2 OAB = 180°
2 OAB = 100°
OAB = 50° => x = 50° option 3
4) ADC = 1/2 [ AOC ]
=> ADC = 1/2 [ 62° + 28° ]
=> ADC = 1/2 × 90°
=> ADC = 45° option (1)
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