CBSE Class 10 – Mathematics: Questions and Answers Chapter – 10 Circles Part 10 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 24:

Find the unknown length .

PT is Tangent to a Circle and PAB is a Secant

Answer:

PT is tangent to a circle and PAB is a secant.

Question 25:

In the given figure, OD is perpendicular to the chord AB of a circle whose center is O. If BC is a diameter, find .

AB of a Circle Whose Centre is O

Answer:

Since BC is a diameter

Also

Question 26:

In the given figure, and are tangents from to the circle with centre O. R is a point on the circle such that ARB is a tangent to the circle prove that .

Tangents from External Point

Answer:

In the given figure, and are tangents from external point

Question 27:

Prove that the segment joining the points of contact of two parallel tangents, passes through the center.

Given Two Parallel Tangents PQ and ₹

Answer:

Given two parallel tangents and ₹ of a circle with centre

Draw line .

i.e.. ,

Question 28:

In figure, if , , then length of AB is

Illustration 2 for CBSE Class 10 – Mathemati …

Answer: