A circle is a/an

• open figure

• closed figure

• half open figure

A circle is formed by a

• curved line

• zig-zag line

• straight line

Every circle has

• 2 centres

• 3 centres

• 1 centre

All line segments drawn from the centre of a circle to a point on the circle are called

• diameter

• chord

• radius

The length of a circle is called

• radius

• centre

• circumference

Line joining two points of a circle is called

• circumference

• chord

• diameter

Choose the correct relationship formula

• D = 2R

• R = 2D

• D = R

______ is a chord that goes through the centre of the circle.

If the radius of a circle is 6 cm then its diameter will be _____

If the diameter of a circle is 24 cm then radius will be ______