There are three points A, B and C on the circle. If AB = AC = 7√(2) cm and ∠BAC = 90o, then find the radius of the circle.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 7 cm.
| Understanding/Application |
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∠BAC = 90 The angle subtended by the diameter at any point on the circle is 90º BC is the diameter subtending 90º at A. AB = AC = 7√(2) cm Let the radius of the circle be r. |
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Acc. to the question - r2 + r2 = (7√(2))2 2r2 = 49(2) r2 = 49 r = 7 cm |