Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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Find the value of x° in the following figure: - Mathematics

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Sum

Find the value of x° in the following figure:

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Solution

Reflex ∠YOZ = 2∠YXZ

= 2(120°)

= 240°

∠YOZ = 360° – reflex ∠YOZ

= 360° – 240°

= 120°

∴ x = 120°

Concept: Theorem: The angle subtended by an arc of the circle at the centre is double the angle subtended by it at any point on the remaining part of the circle.
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APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 9th Mathematics Answers Guide
Chapter 4 Geometry
Exercise 4.3 | Q 7. (iv) | Page 170
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