Distance of chord PQ from the centre of a circle is 1 cm. Length of the
chord PQ is 4 cm. Find the radius of the circle.
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Answer:
PQ is 4 cm. Find the radius of the circle. (Pg.No. 158)
Sol : i) 1
PM
2 = [Perpendicular drawn from the centre
∴ PM of a circle to the chord bisects the chord]
ii) In ∆OMP, ∠OMP = 90°
OP2
= OM2
+PM2
[Pythagoras theorem]
2 OP =
OP = [Taking square root on both sides]
Step-by-step explanation:
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