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An arc of length r unit subtends an angle theta at the centre of circle of radius r. find the value of theta |
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Answer» Answer: Angle subtended by an Arc , θ = 144° Length of Arc, l = (θ/360) × 2πr 20π = (144°/360°) × 2× π × r 20 = (144°/360°) × 2r 20 = (12/30) × 2r 20 = (⅖)× 2r 20 × 5 = 4r r = 100/4 r = 25 cm Radius of the circle, r = 25 cm Read more on Brainly.in - brainly.in/question/5232296#readmore |
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