basic mathematics image
 basic mathematics image

Area of triangles


The area of triangles can be found by using the following formula:

formula-for-triangle-image

The figure below illustrates what base and height are

base-and-height-image

The red line represents the length of the base (call it b if you want) and the blue line represents the length of the height.

To get the area, just multiply the value of the base by the value of the height and divide the result by 2.

Example #1

Find the area for the following figure:
triangle-image

calculation-image

The area is 18 square inches or 18 inches2

Example #2 Find the area for the following figure:

triangle-image

The area is equal to (4 ×3)/2 or 12/2

The area is 6 inches2

Example #3

Find the area for the following figure:

triangle-image



The area is (5 × 6)/2 = 30/2

The area is 15 inches2

Heron's formula
Learn how to use Heron's formula. It can also be used to find the area of a triangle

Area of an equilateral triangle
A special formula to get the area of an equilateral triangle




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