Friday, November 16, 2012

Sides of a Polygon Formula

Introduction to sides of a polygon formula:

In geometry, polygon is two dimensional shapes. It has more than two sides. All sides are straight and connected to another side. The number of vertices is equal to number of sides. Vertices are nothing but corner points of the shape. In this article we shall see how to calculate the area of regular polygon.

Sides of a Polygon Formula - Formulas:

Triangle:

Formula to find area of triangle:

Area of triangle (A) = `1/2` (b x h) square units

b – Base

h – Height

Square:



Formula to find area of square:

Area of square (A) =a2 square units

a – side length                            

Pentagon:



Formula to find the pentagon:

Area of the pentagon (A) = t2 1.72 square units

t – Side length

Hexagon:



Formula to find area of hexagon:

Area (A) = t2 2.6 square units.

t - Side length

Understanding 6th grade math problems with answers is always challenging for me but thanks to all math help websites to help me out.

Sides of a Polygon Formula – Example Problems:

1. Find the area of triangle whose base is 40 cm and height is 25 cm.

Solution:

Given:

Base (b) = 40 cm

Height (h) = 25 cm

Substitute the given value in the formula

Area of the triangle (A) = `1/2` (b x h) square units

= `1/2` (40 x 25)

= `1/2` (1000)

= 500

Area of the triangle (A) = 500 cm2

2. Find the area of the square, whose side length is 27 cm

Solution:

Given:

Side (a) = 27 cm

Substitute the given value in the formula

Area of square = a2 square units

= 27 x 27

Area of square = 729 cm

3. The side length of pentagon is 13.5 cm. Find the area and perimeter of the pentagon.

Solution:

Given:

Side length (t) = 13.5 cm

Substitute the given value in the formula

Area of the regular pentagon (A) = 1.72 t2 square units

= 1.72 x 13.52

= 1.72 x 182.25

= 313.47

Area of the regular pentagon (A) = 313.47 square units

4. The side length of hexagon is 14.7 cm. find the area of the hexagon.

Solution:

Given:

Side length (t) = 14.7 cm

Substitute the given value in the formula

Formula:

Area of the hexagon (A) = t2 2.6 square units

= 14.72 x 2.6

= 216.09 x 2.6

= 561.834

Area of the hexagon = 561.834 cm2

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