Formula

The lesson on the
area of a square will
explain the basics needed to understand this formula. Here's the summary:

All the sides (edges) of a square have the same length. If each side has the length**L**, the formula for the area **A** will be:

All the sides (edges) of a square have the same length. If each side has the length

Example

Given a square where the length of each side (edge) is 5cm. Find the area of
this square.

Formula

The lesson on
the
area of a rectangle will cover the
basics needed to use this formula. Here's a short summary:

If a rectangle has the length**l **and the width **
w,** we can find the area **A**, by multiplying its width and its length
together. Hence, we have:

If a rectangle has the length

Example

Given a rectangle with the length of 4ft and the width of 3ft.
Find its area.

Formula

The lesson on the
area of a circle will explain to you on
how to use this formula. Here's a short summary:

For a circle with the radius**r**, its area** A**, will
be:

Where**π** is constant that is
approximately equals to 3.14.

For a circle with the radius

Where

Example

Given a circle with the radius 3cm. Find its area.
Take **π** = 3.14.

Formula

The lesson on the
area of a parallelogram will
show you the basic ideas on using this formula. Here's a summary:

For a parallelogram with the base**b **and the height
**h**, the area** A**, is given as:

For a parallelogram with the base

Example

Given a parallelogram with the base 5in and the height 3in. Find the area of
this parallelogram.

Formula

The lesson on the
area of a triangle will explain to you on
how to use this
formula.

Consider a triangle with the base**b** and height **h**,
the area **A**, of this triangle is simply:

Consider a triangle with the base

Example

Given a triangle with the base 4cm and the height
2cm. Find
its area.

Formula

The lesson on the
area of a trapezoid will explain the
steps on using its formula for area. Here's the summary:

For a trapezoid with the height**h** and two parallel sides **a** and **b**, its area** A**,
is given as:

For a trapezoid with the height

Example

Given a trapezoid with the height of 4in, and two parallel sides of 2in and 3in
respectively. Calculate its area.

Return to Home Page from
Formula for Area