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2. Inform you about new question papers.

3. New video tutorials information.

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#### shaalaa.com | Circles part 1 (Introduction)

#### Series 1: playing of 7

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Circles

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Circles part 1 (Introduction)

00:13:10

00:13:10

Circles part 2 (Theorems Tangent Secant)

00:10:01

00:10:01

Circles part 3 (Theorems Tangent Secant)

00:10:36

00:10:36

Circles part 4 (Examples Tangent Secant)

00:07:49

00:07:49

Circles part 5 (Examples Tangent Secant)

00:10:54

00:10:54

Circles part 6 (Examples Tangent Secant)

00:11:33

00:11:33

Circles part 7 (Examples Tangent Secant)

00:11:05

00:11:05

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Tangent to a circle at, point of contact

- (Prove) The tangent at any point of a circle is perpendicular to the radius through the point of contact.
- (Prove) The lengths of tangents drawn from an external point to a circle are equal.