How do you find the area of a equalateral and other triangles?

Phill Student middle or secondary class
thank you

Hi Phill,

The most common expression used to find the area of a triangle is

 1/2 x base x height. Thus, for example, the triangle below has a base of 5 units and a height of 2 units so its area is  1/2 x 5 x 2 = 5 square units.

A second expression that is often useful is Herron's Formula. You can find the formula and an example in the answer to a previous question.


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