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Encapsulate
math

PERIMETER AND AREA

Perimeter Area

Perimeter is the distance around a closed figure. The region covered by a plane closed figure is
called the area.

Perimeter of a Rectangle
Perimeter of a rectangle = 2 × (length + breadth) Area of a Rectangle
Area of a rectangle = length × breadth

Perimeter of a Triangle
Perimeter of a triangle = Sum of lengths of all Area of a Square
its sides Area of a square = (side × side)

Perimeter of a Square Area of a Parallelogram
Perimeter of a square = 4 × (side) Area of a parallelogram = base × height

Circumference of a Circle Area of a Triangle
Circumference of a circle = 2pr, where r is the Area of a triangle = 1 × base × height
radius of circle 2

Perimeter of a Parallelogram Area of a circle
2
Perimeter of a parallelogram = Sum of lengths Area of a circle = pr , where r is the radius of
of all sides Circle

maths fun

Solve the given crossword and then fill up the given boxes. 1
Across: 4
2. 2 (l + b) = ________ of a rectangle. 3
2
3. pr = _________ of a circle of radius r.
5. side × side = Area of a _______.
Down: 5
1. 2pr = _______ of a circle of radius r.
4. base × height = Area of a _______. 7 6
1 2
6. Area of ________ = × base × altitude.
2
7. ________ = 2 × radius.

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