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**

*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?