Find the radius of a circle, if the length of the chord in a circle is 70 cm long and the perpendicular bisector of the chord from the centre is 12 cm long.

Geometry Practice Test 1

In ΔOAC,
OA = radius = √OC2+AC2
= √122+(

)2
OA = √144+1225
OA = √1369
OA = 37 cm

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