In a figure ab and cd are two chords of a circle with centre o such that c, d are collinear and if ab is equal to 3 cm then what is the radius of the circle
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Radius = 4.5 cm ab and cd are two chords of a circle with centre o such that c, d are collinear ab = 3 cm & ab = (1/3)CD
Step-by-step explanation:
AB = CD/3
C O D are colinear
O is center of circle
=> CD is Diameter
=> CD = 2 * Radius
AB = CD/3
=> AB = 2 * Radius /3
AB = 3 cm
=> 2 * Radius /3 = 3
=> 2 * Radius = 9
=> Radius = 4.5 cm
Radius of circle = 4.5 cm
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