AREA AND PERIMETERGRADE - 3 : AREA AND PERIMETERGRADE - 3 BY :
MONALI THAKUR
monali_253@yahoo.co.in
Slide 2 : Perimeter Perimeter of a shape is the total length of its sides. It is the distance around the outside edge of a flat object. length breadth
Slide 3 : Perimeter of a rectangle Perimeter of a rectangle
= length + breadth + length + breadth
= l + b + l + b
= 2l + 2b
= 2(l+b) length breadth
Slide 4 : Perimeter of a square side side Perimeter of a square
= side + side + side + side
= 4 x side
Slide 5 : Perimeter of some more polygons Perimeter of an equilateral triangle
= side + side + side
= 3 X side
= 3s Perimeter of a rhombus
= side + side + side + side
= 4 X side
= 4s
Slide 6 : Perimeter of a pentagon
= 5s Perimeter of a parallelogram
= 2 ( l + b)
Slide 7 : Perimeter of a circle
= circumference of the circle
= 2. pi. r
Slide 8 : Sarah has a garden that is 4 feet by 3 feet . What is the perimeter of Sarah’s garden?
Slide 9 : What is the perimeter of an equilateral triangle of side 20 cm?
Slide 10 : Find area of a square whose side is 8m?
Slide 11 : Find the perimeter of the following figure: 15m 12m 7m 8m
Slide 12 : Area length breadth Area measures the surface of something.
It is the amount of surface space that a flat object has.
Slide 13 : Area of a rectangle Area of a rectangle
= length x breadth
Slide 14 : Area of a square Area of a square
= side x side
= (side)2
Slide 15 : Area of a Triangle b h Area of a triangle
= ½ x base x height
Slide 16 : Area of a Circle Area of a circle
= pi . R2
(where r is the radius)
Slide 17 : Find the area of a rectangular field which is 40km long and 30km wide.
Slide 18 : The perimeter of a square is 48cm. What is it’s area?
Slide 19 : A farmer walks once around a rectangular field of length 100m and breadth 75m. How much distance does he walk?
Slide 20 : A badminton court is 25m long and 12m broad. Find its area.
Slide 21 : Any queries ??
Slide 22 : THANK YOU !!