Perimeter & Area PRESENTATION ON BY : SIDDHARTH SHARMA 7th E

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Presentation transcript:

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

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.

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)

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)

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

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.

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

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)

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)

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

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