Qn 1.

Haritha and Krishna jointly made regular polygons with sides 3cm to participate in Maths fair.

a) what is the perimeter of a regular pentagon which they had made.?

b) What is the perimeter of a n sided regular polygons

c)In any regular polygons is the perimeter is proportional to the length of its side? If so what is the proportionality constant?

Qn 2.

The length of the diagonal of a square is 4 cm

a) What is its area?

b) The length of a diagonal of a square is d units and its area is A sq. units. write the relation between them?

c) Which is the proportionality constant?

Qn 3.

The lengths of the sides of two rectangles are proportional. The length and breadth of the smaller are 12cm and 4 cm respectively. The length of the larger rectangle is 18 cm.

a)Write the ratio between the sides of the smaller rectangle

b) what is the breadth of the larger rectangle?