A closed shape has 20 equal sides and one of its sides is 3 cm. Find its perimeter.

Two plots have the same perimeter. One is a square of side 10 m and another is a rectangle of breadth 8 m. Which plot has the greater area and by how much?

Find the approximate area of the flower in the given square grid.

Mark the base and height of the following right angled triangles
(i)

(ii)

(iii)

(iv)

(v)

(vi)

From all possible shapes of perimeter 80 cm with 9 identical squares, each of side 4 cm.