1. Perimeter & Area PRESENTATION ON BY : SIDDHARTH SHARMA 7th E
RYAN INTERNATIONAL SCHOOL (CHANDIGARH)

2. Perimeter
The sum of lengths of all sides of a plane figure, or the length of its boundary, is called the perimeter of the figure.

3. Perimeter of a Rectangle
A rectangle is a figure with 4 sides. Opposite sides are equal.
The formula for the perimeter of a rectangle is:
P = 2*( length + breadth)

4. Perimeter of a Square A square is a figure with 4 equal sides.
The formula for the perimeter of a square is:
P = (4*side)

5. Find the perimeter of the squares using the formula P = 4*SIDE .B.
P = 36 m
P = 28 in. C. D.
P = 44 mm
P = 20 cm

6. Find the perimeter of the rectangles using the formula P = 2(L+B).
P = 30 cm C.
P = 28 m D.
P = 54 mm
P = 28 in.

7. Area
The area of a figure is the number of square units that cover the surface of the closed figure.

8. Area of a Square
The area of a square is found by finding how many square units it takes to cover its surface.
The formula for the area of a square is: A = (s x s)

9. Area of a Rectangle
The area of a rectangle is found by finding how many square units it takes to cover its surface.
The formula for the area of a rectangle is: A =( l x w)

10. Find the area of the squares using the formula A = S x S.B. A.
A = 16 cm2
A = 25 sq. in. D. C.
A = 81 sq. ft.
A = 49 m2

11. Find the area of the rectangles using the formula A = l x w.B.
A = 24 cm2
A = 77 sq. in. C. D.
A = 48 sq. ft.
A = 140 mm2