# The length of a c

Given PQ = 4cm, Distance from the Center is 2,1cm

PQ = 2 PD

Perpendicular from the center of the circle to any Chord bisects it in two line segments

PD

PD = 2cm

In O PD , Using Pythagoras Theorem

OD2 + PD 2 = OP2

OP2 = 2.12 + 22

OP2 = 8.41

OP = 2.9cm

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