AB is a tangent to a circle with centre O. If the radius at the circle is 7 cm and the length of AB is 24 cm (A is outside the circle), then what is the length (in cm) of OA?

AB is a tangent to a circle with centre O. If the radius at the circle

1.	AB is a tangent to a circle with centre O. If the radius at the circle is 7 cm and the length of AB is 24 cm (A is outside the circle), then what is the length (in cm) of OA?
A.	25
B.	26
C.	28
D.	31
Answer» B. 26

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AB is a tangent to a circle with centre O. If the radius at the circle is 7 cm and the length of AB is 24 cm (A is outside the circle), then what is the length (in cm) of OA?

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