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प्रश्न
A tangent is drawn from a point at a distance of 17 cm of circle C(0, r) of radius 8 cm. The length of its tangent is ______
पर्याय
5 cm
9 cm
15 cm
23 cm
MCQ
रिकाम्या जागा भरा
उत्तर
A tangent is drawn from a point at a distance of 17 cm of circle C(0, r) of radius 8 cm. The length of its tangent is 15 cm.
Explanation:
In ∆OAP, AP² + OA² = OP²
⇒ AP² + (8)² = (17)²
⇒ AP² + 64 = 289
⇒ AP² = 289 – 64 = 225
∴ AP = `sqrt225` = 15 cm
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