On the basis of the given figure, the length of a rectangle in the net of a cylinder is same as circumference of circles in its net.

In the given figure, what is the length of AB in rectangle ABCD?

The perimeter of a circle is called its circumference.

Which of the following is the net for a cylinder ?

The diagonals of a rectangle are of same length

Which of the following nets is a net of a cylinder?

The given figure is the net of a cube.Fold these faces to make a cube.

(a) We know that area of rectangle is equal to the product of its length l and breadth b. therefore the formula for the area of the rectangle is given by A=lb. (b) Consider the statement, 'the circumference of a circle is equal to pi times its diameter' frame a formula for this statement.