Area of Triangles - Concept

Concept Concept (1)

The formula for calculating the area of triangles comes from dividing a parallelogram in half, so the area is half of base times height. When finding the area of a triangle, the height is an altitude and the base must be the side intersected by the altitude. When given the area and asked for a base or height, a common mistake is to forget to multiply both sides of the equation by 2 before dividing.

Sample Sample Problems (2)

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Area of Triangles - Problem 1
Problem 1
How to find the height of a triangle, given the three sides of a right triangle, using the area of a triangle formula.
Area of Triangles - Problem 2
Problem 2
How to find an unknown variable, x, when the area is given and the base and height of a triangle is given in terms of x.