Find the area of a triangle using the formula (b x h)/2. You need the value of "b," or base, and "h," or height.
- Determine the base
Pick one side of the triangle, and determine its length. This is the base.
- Determine the height
Measure the perpendicular distance from the base to the vertex opposite it. This is the height.
- Multiply base by height
Multiply the base of the triangle by its height.
- Find the area
Using the formula for finding the area of a triangle, divide the product of base and height by 2. If the base is 4 centimeters and the height is 5 centimeters, then the area is (4 x 5)/2, or 10 square centimeters.