Arindam Mukherjee, 5th Grade
| Shape | Description | Formula and examples |
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Perimeter of any shape, like a rectangle, square, or triangle | Add up all the sides
for example length of a rectangle is 5cm and the width is 2cm. The
area of the rectangle (x) as shown below x = (4 sides) = 5+2+5+2 = 14cm |
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The area of a rectangle or square can be calculated by multiplying the length x width. | In this example
consider L is length and W is width. If L is 5cm and width is 2cm,
the area of a rectangle or square(X) can be calculated as shown
below. X = Length x Width = 5cm x 2cm = 10cm 2 |
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The area of a parallelogram can be calculated by multiplying the base x height. | In this example
pretend that the height is 2 cm and the base is 5cm. The area of the
parallelogram (X) can be calculated as shown below. X = Base x Height = 5 x 2 = 10cm2 |
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The area of a triangle can be calculated by multiplying 1/2 the base x its height. | In this example
pretend that the height is 2cm and the base is 5cm. The area of a
triangle (X) can be calculated as shown below. X = 1/2 Base x Height = 2.5cm x 2cm = 5cm2 |
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The area of a circle can be calculated by multiplying pi (3.14) x radius2. | In this example
pretend that the radius is 5cm. The area of a circle (X) can be
calculated as shown below. X = pi (3.14) x Radius2 = pi x 25cm = 78.5cm2 |
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The circumference of a circle can be calculated by multiplying pi (3.14) x the diameter. | In this example
pretend that the diameter is 10cm. The circumference of a circle (X)
can be calculated as shown below. X = pi (3.14) x Diameter = pi x10cm = 31.4cm2 |