Use These Measurements
How to calculate the area of a square
- your area in feet.
- 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 & 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 & B) in feet.
- Add the lengths together.
- 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.
