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Tangents from a Given Point

O is a point ...

Question

O is a point outside the circle and OA and OB are the two tangents drawn from the external point 'O'. If OA = 10cm, find the length of OB.

5 cm

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10 cm

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8 cm

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20 cm

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Solution

The correct option is B 10 cm

Given:
OA, OB are tangents from an external point and OA = 10 cm

We know that,
Tangents from an external point to a circle are equal in length.

i.e, OA = OB
Therefore, the length of OB is also 10 cm.

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O is a point outside the circle and OA and OB are the two tangents drawn from the external point 'O'. If OA = 10cm, find the length of OB.

The correct option is B 10 cm Given: OA, OB are tangents from an external point and OA = 10 cm We know that, Tangents from an external point to a circle are equal in length. i.e, OA = OB Therefore, the length of OB is also 10 cm.

The correct option is B 10 cm

Given:
OA, OB are tangents from an external point and OA = 10 cm

We know that,
Tangents from an external point to a circle are equal in length.

i.e, OA = OB
Therefore, the length of OB is also 10 cm.