Question

the angle substended by the diameter in a circle is a/90 b/180 c/60d/45

Answer 1

Step-by-step explanation:

To prove : ∠APB=90

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∵ We know angle subtended by an arc at centre is double the angle subtended at any point or circumference.

⇒ Angle subtended by arc AB at O= Double the angle subtended at P

⇒∠AOB=2∠APB

∵AOB is a straight line.

⇒∠AOB=180

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⇒2∠APB=180

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⇒∠APB=90

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∴ Angle subtended by arc AB or semi circle is 90

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solution