Perimeter
In geometry, perimeter is the distance around a flat object. For example, all four sides of a square rhombus have the same length, so a rhombus with side length 2 inches would have a perimeter of 8 inches (2 2 2 2=8).
For a polygon, the perimeter is simply the sum of the length of all of its sides.[1] For a rectangle, the perimeter is twice the sum of its length and width ().[2] Perimeter can also be calculated for other planar figures, such as circle, sector and ellipse.[3]
Real-life objects have perimeters as well. A football field, including the end zones, is 360 feet long and 160 feet wide. This means that the perimeter of the field is 360 160 360 160=1040 feet.
The perimeter of a circle is usually called the circumference.[3] It may be calculated by multiplying the diameter times "Pi". Pi is a constant which is approximately equal to 3.14159; however, the places to the right of the decimal are endless. The number of places used depends on the accuracy required for the result.
Related pages
changeReferences
change- ↑ "Perimeter and Area". www.montereyinstitute.org. Retrieved 2020-09-25.
- ↑ "List of Geometry and Trigonometry Symbols". Math Vault. 2020-04-17. Retrieved 2020-09-25.
- ↑ 3.0 3.1 "Perimeter". www.mathsisfun.com. Retrieved 2020-09-25.
