Perimeter Problems in Math

Introduction about perimeter:

In math, perimeter can be calculated for 2D and 3D shapes. The length of the boundary of any closed figure is called perimeter of that shape. The perimeter is expressed in units. In this article we shall see how to calculate the perimeter of basic 2D shapes with example problems.

I like to share this Perimeter of Triangle with you all through my article.

Math perimeter Formulas to solve problems:


Square:

Math Formula:

Perimeter of the square (P) =4 x a units

Rectangle:

Math Formula:

Perimeter (p) =2(l x w) units

Circle:

Math Formula:

Circumference (perimeter) of the circle = 2pr units

( r is the radius of the circle)

Triangle:

Math formula:

Perimeter of equilateral triangle (P) =3 a units

a – side length

Kite:

Math formula:

Perimeter of kite (P) = 2a + 2b units

a , b – side length.

I have recently faced lot of problem while learning Perfect Square Formula, But thank to online resources of math which helped me to learn myself easily on net.

Perimeter problems in math -Example problems:


Square:

The square has the side length 7cm.find the perimeter of the square.

Solution:

Given:

a= 7 meters

Perimeter of the square = 4 x a

=4 x 7

Perimeter of the square = 28 meters

Rectangle:

The rectangle has length and width 5cm and 4cm respectively. Find the perimeter of the rectangle.

Solution:

Given:    Length= 5 meters, Width =4 meters

Formula:

Perimeter of the rectangle   = 2(l + w)

=2(5+ 4)

= 2 (9)

Perimeter of the rectangle = 18 meters

Circle:

The radius(r) of a circle is 10 inches. Find the circumference (perimeter) of that circle?

Solution:

Given: r = 10 inches

Formula:

Circumference of the circle = 2pr.

= 2 x 3.14 x 10

Circumference of the circle = 62.8 inches

some more example problems:

Triangle:

Find the perimeter of equilateral triangle whose side 14 cm.

Solution:

All sides of equilateral triangle area equal.

Side of triangle, a = 14 cm

Formula:

Perimeter of equilateral triangle (P) = 3a

= 3 x 14

Perimeter of equilateral triangle = 42 centimeters

Kite:

The kite has length 8cm and width 4 cm. find the perimeter of the kite.

Solution:

Given:

Length (a) = 8 cm

Width (b) = 4 cm

Perimeter of kite = 2a + 2b

= 2 x 8 + 2 x 4

= 16 + 8

= 24 centimeters