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Ex 9.3, 1 - Chapter 9 Class 9 Circles
Last updated at April 16, 2024 by Teachoo
Angle subtended by arc at the centre
Chapter 9 Class 9 Circles
Concept wise
- Terms and definations
- Angle subtended by chord at a point
- Circle through 3 points
- Equal chords and their distance from centre
-
Angle subtended by arc at the centre
- Cyclic quadrilaterals
Transcript
Ex 9.3, 1 In the given figure, A, B and C are three points on a circle with centre O such that BOC = 30 and AOB = 60 . If D is a point on the circle other than the arc ABC, find ADC. AOC = AOB + BOC = 60 + 30 = 90 Arc ABC subtends AOC at centre of circle. And ADC on point D AOC = 2 ADC 90 = 2 ADC 2 ADC = 90 ADC = 1/2 90 ADC = 45
