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Area of a Triangle

Triangle Area Formula

The formula for area of a triangle is given as:

A = 12bh

Where A is the area, b is the base, and h is the height. 

area of a triangle

Example Problems

Problem 1:
Find the area of a triangle with a base of 10 and a height of 5.

1.) Let’s plug the given dimensions into the formula.
A = 12bh
A = 12(10)(5) = 25
2.) The area is 25.

Problem 2:
A triangle’s area is measured to be 4.5 square meters and it has an equal base and height. What is the height in meters?

1.) Let’s equate the base and height so that we can substitute height in for base.
b = h
bh = h2
2.) Now we can plug the given value into the formula and solve for the height h.
A = 12h2
4.5 = 12h2
9 = h2
h = 3
3.) The height is 3 meters.

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