Use our triangle area calculator to find the area of any triangle. A triangle is a polygon with 3 sides. There are 3 different types of triangles that relate to the length of the sides. An equilateral triangle is a triangle where all three sides are the same length. If two sides are the same length then it is referred to as an isosceles triangle, and if all three sides are different then it is called an scalene triangle. For an equilateral triangle there is an area formula that utilizes the length of one of the sides, but if the sides and angles are different then you will need to have the measurement for the base and the height to use this formula.

The formula used to calculate the area of a triangle is (1/2)BH where B is the base and H is the height of the triangle. When you think of the area of a parallelogram being Base*Height then a triangle would have half the area. All you will need to do is input the measurements for the base and height into the form fields and our triangle area calculator will do the calculations for you. While this calculator can be a useful tool for your geometry homework and for calculating the area of triangular shapes around your home, we suggest learning the formulas to recall for a test or if you are without access to our calculator.