# MEASURING GUIDE

How to calculate the area of a square • Multiply the two numbers together.
• Total is the square footage required.

Example: 20’ x 20’ = 400 sq. ft.

How to calculate the area of a rectangle • Measure the length and the width of your area in feet.
• Multiply the two numbers together.
• Total is the square footage required.

Example: 20 ’ x 40 ’ = 800 sq. ft.

How to calculate the area of a circle • To calculate the sq. ft. of a circle, multiply the radius by the radius, then multiply by 3.14.
• The radius is half the distance across the circle.

Example: 15’ x 15’ = 225 x 3.14 = 706.5 sq. ft.

How to calculate the area of a oval • To calculate the sq. ft. of an oval, multiply radius (A) by radius (B), then multiply by 3.14.
• Find the center point to measure the two radius.

Example: 5’ x 10’ x 3.14 = 157 sq. ft.

How to calculate the area of a trapezoid • A trapezoid is a 4 sided figure with one pair of parallel sides.
• Measure the length of each parallel side (Base A and B) in feet.
• Multiply the result by the height.
• Divide the result by 2

Example: 15’ + 25’= 40 x 10’= 400 ÷ 2 = 200 sq. ft.

How to calculate the area of a parallelogram • A parallelogram is a 4 sided shape having two pairs of parallel lines.
• Opposite sides are equal in length and opposite angles are equal in measure.
• To find the area of a parallelogram, multiply the length by the height.

Example: 15’ x 20’ = 300 sq. ft.

How to calculate the area of a triangle • To figure the area of a triangle, multiply the base by the height and divide by 2

Example: 20’ x 20’ = 400 ’ ÷ 2 = 200 sq. ft.

How to calculate the area of an odd shaped area • Any area bounded by more than 4 sides may be divided into a series of shapes making it easier to calculate.
• The sum of the shapes is the square footage needed.

Example:  Shape A : 10’ x 10’ = 100 sq.ft.   Shape B : 10’ x 15’ = 150 ÷ 2 = 75 sq.ft.

Sum of the shapes : 100’ + 75’ = 175 sq.ft.

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