To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

Calculates the area of a triangle given three sides. Thank you for your questionnaire. Sending completion. To improve this 'Area of a triangle (Heron's formula) Calculator', please fill in questionnaire.