Geometry Practice Test 1

Question : 15 of 40

Marks: +1, -0

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.

35.6 cm
47 cm
42.73 cm
37 cm
39.9 cm

Validate

Solution:

In ΔOAC,
OA = radius =

√{OC^2+AC^2}

√{12^2+({70}/2)^2}

OA =

√{144+1225}

OA =

√{1369}

OA = 37 cm

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