The Formula Used to Find the Area of a Triangle


The formula for finding the area of a triangle is really easy to remember. One way to recall this formula is to visualize the inside of the triangle as having a vertical line that runs from the bottom (base) to the top of the triangle (apex). And since area deals with the inner part of geometric shapes, it makes sense there would be a line inside the triangle to represent a measure of the height.

Instructions for finding the area of a triangle

The area of a triangle is found by multiplying the base of the triangle by the height of the triangle and dividing by 2.

The formula

1/2 (b * h)

An example of finding the area of a triangle using “in” for inches as the measure

Formula for finding the area of a triangle with b for the base and h for the height of the triangle.

b = 9 in

h = 6 in

A = (1/2) (9 in) (6 in)

= (1/2) 54 in2

= 27 in2

The area of the triangle in this example is twenty-seven (27) square inches using the formula.

All posts in this series:  What is a circle? | What is the radius of a circle? | What is the diameter of a circle? | What is the circumference of a circle?What is the area of a rectangle? | What is the perimeter of a triangle? | What is the area of a triangle?