Area of triangles


The area of triangles can be found by using the following formula. As you can see, to find the area, just multiply the base by the height and divide the result by 2.

The figure below illustrates what base and height are

Height of a triangle
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:
Base and height of a triangle
Area computation
The area is 18 square inches or 18 inches2

Example #2 Find the area for the following figure:

Base and height of an obtuse triangle


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:

Base and height of a right triangle


The area is (5 × 6)/2 = 30/2

The area is 15 inches2

Take the quiz below to see how well you can find the area of a triangle.

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