This is the basic and conceptual question from Chapter name- circles

Topic – Angle properties of circles

Chapter number- 15

In this question is given that tangents PQ and PR are drawn from an external point P to a circle such that ∠RPQ = 30°.

Also A chord RS is drawn parallel to the tangent PQ,

Now we have to find ∠RQS

ICSE Avichal publication

Understanding ICSE Mathematics

Question 20

Solution:In the given figure,

PQ and PR are tangents to the circle with centre O drawn from P

∠RPQ = 30°

Chord RS || PQ is drawn

To find ∠RQS

∴ PQ = PR (tangents to the circle)