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<powerprep> arcs and chords [#permalink]
04 Sep 2006, 12:11

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct
0% (00:00) wrong based on 1 sessions

Question from powerprep. See attachment for details.
Basically it is asking for the length of minor arc PQ.
Please ignore marked answer. What is the underlying concept here?

using properties of triangles and parallel lines.
if C is the center of the circle, then CPQ = PQC = 70;
the angle subtending the arc is 40; so the length of the arc is 40/360 * 2 * pi * 9

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