Formula for Area
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 L, the formula for the area A will be:
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 l and the width w, we can find the area A, by multiplying its width and its length together. Hence, we have:
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 r, its area A, will be:
Where π is constant that is approximately equals to 3.14.
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 b and the height h, the area A, is given as:
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 b and height h, the area A, of this triangle is simply:
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 h and two parallel sides a and b, its area A, is given as:
Example
Given a trapezoid with the height of 4in, and two parallel sides of 2in and 3in
respectively. Calculate its area.
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Formula for Area
