Answer: area = 1/2 * base * height.
In other words, 1 2bh
Explanation: The formula for the area of a triangle is a 1 2bh
Finding area of triangles. To find a triangle's area, use the formula area = 1/2 * base * height. Choose a side to use for the base, and find the height of the triangle from that base. Then, plug in the measurements you have for the base and height into the formula.