Perimeter and surface areas of plane figures

Surface area is,

Derive the formula for the curved surface area and total surface area of the frustum of a cone.

Find the ratio of the surface area of a sphere and total surface area of a hemisphere.

Find the surface area and total surface area of a hemisphere of radius 21cm.

The following figure shows a closed victory-stand whose dimensions are given in cm. Find the volume and the surface area of the victory stand.

Find the perimeter of each of the following figures :

Find the area and perimeter of each of the following figures, if the area of each small square is 1 sq cm.

Find the perimeter and area of a square of side 9 cm .

Find the perimeter of each of the following figures: (i) Figure (ii) Figure (iii) Figure

ABCD is a square with sides 12 cm each. Find its perimeter and area. Cut off a rectangle measuring C 8cm 2 cm by 4 cm from a corner as shown in the figure. Find the perimeter and area of the new polygon thus formed.