Tangents Circles and Right Triangles

In the figure, O is the Centre of the circle. A is a point on the circle. Tangent AP=15cm, OP=17cm. Then the diameter of the circle is

• 4cm

• 8cm

• 12cm

• 16cm

In the figure AP and BP are tangents and O is the Centre of the circle. If ∠APB=80⁰. then ∠AOB is equal to

• 40⁰.

• 80⁰.

• 50⁰.

• 100⁰.

A line intersects the circle at one and only point is called

• TANGENT

• SECANT

• BISECTOR

• MEDIAN

If distance between two parallel tangents drawn to a circle is 4cm ,find the radius of the circle

• 1cm

• 2cm

• 4cm

• 6cm

What is the value of x?

• 22

• 25

• 15

• 20

Maximum number of tangents that can be drawn to a circle from an external point is

• 4

• 2

• 1

• 0

The longest side of a right-angled triangle is called

• DIAGONAL

• HYPOTENUSE

• BASE

• HEIGHT

Find the radius r

• 2

• 3

• 4

• 5

Assume that the lines that appear to be tangent are tangent. O is the center of the circle. Find the value of x to the nearest tenth.

• 11.7

• 10.8

• 13.0

• 14.2

Assume that lines that appear to be tangent are tangent. O is the center of the circle. What is the value of x? (HINT: Remember tangent lines and circles create right triangles)