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Grade 3 - Mathematics
8.12 Area and Perimeter
Area of a square is side x side.
Perimeter of a square is 4 x side.
Area of rectangle is width x height.
Perimeter of rectangle is 2(length + width)
Perimeter of an equilateral triangle is 3 x side.
: What is the perimeter of a rectangle whose width is 2 cm and height is 5 cm.
Perimeter = 2(width + height)
Perimeter = 2(2 + 5 )
Perimeter = 2(7)
Answer: 14 cm
Answer the following. Also draw at least five examples of triangle, square and a rectangle and find its area and perimeter.
: A triangle has sides of 3cm, 4cm and 3 cm. What is the perimeter?
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