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Question
CP and CQ are tangents to a circle with centre at 0. ARB is another tangent touching the circle at R. If CP = 11 cm and BC = 7 cm, then the length of BR is
Options
6 cm
5 cm
8 cm
4 cm
Solution
4 cm
Explanation;
Hint:
BQ = BR = 4 cm ...(Tangent of the circle)
PC = QC = 11 cm ...(Tangent of the circle)
QC = 11 cm
QB + BC = 11
QB + 7 = 11
QB = 11 – 7 = 4 cm
BR = BQ = 4 cm
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