Perimeter: Locate the Absent Side Lengths

As you know, if you do not have the length of a polygon, you can use the perimeter to determine the length of the missing side. but how? This is what we are going to teach you in this article.

A perimeter of a shape is described as the complete distance around a shape. It’s the outline’s length or the boundary of any \(2\)-dimensional geometric shape.

A perimeter of various figures could be identical in measurement dependent on their dimensions. For instance, think of a triangle made with a wire consisting of length \(L\). The identical wire could be reprocessed into a square since all the sides are identical in length.

How to Locate the Perimeter?

A perimeter is the measurement of length contained by the boundary of a shape. Therefore, the perimeter’s units are identical to the units of length. You can state that a perimeter is \(1\)-dimensional.

Consequently, you can measure it in centimeters, meters, kilometers, etc. A few additional units for doing a measurement of an accepted internationally are miles, yards, feet, and inches.

Perimeter = Amount of all the sides

Shape	Perimeter Formulas
Square	The perimeter of a square \(= 4 × L\) where \(L =\) length of a side.
Rectangle	Perimeter of a rectangle \(= 2 × (l + b)\) where \(l, b =\) length, and width of the rectangle respectively
Triangle	Perimeter of a triangle \(= a + b + c\) where \(a, b, c =\) lengths of three sides
Quadrilateral	Perimeter of a quadrilateral \(= a + b + c + d\) where \(a, b, c, d =\) lengths of four sides

If one side’s length is not there, employing perimeter you can locate the missing side’s length.

Step one: We are aware perimeters are the length around shapes. Thus, firstly add all sides that are known.

Step two: Subtract the quantity of the sides that are known from a perimeter to locate the missing side’s length.

Note: If you know a rectangle’s perimeter, as well as at least one side’s length, it’s possible to locate the additional \(3\) sides yourself!