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A chord PQ of length 15cm subtends an angle of 65º at the circumference centre O. Find the radius of the circle.

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asked Aug 16, 2021 in Mathematics Form 3 by anony mous

A chord PQ of length 15cm subtends an angle of 65º at the circumference centre O. Find the radius of the circle.

circles chords and tangents

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answered Aug 16, 2021 by anony mous

7.5 = Sin 32.5°
r
r = 7.5
Sin 32.5
=12.92cm

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