A two-dimensional Euclidean spaceIn other words there is only one plane that contains that triangle and every. Herons Formula for the area of a triangleHeros Formula A method for calculating the area of a triangle when you know the lengths of all three sides. The formula for the area of an equilateral triangle with all sides congruent is equal to A s 2 3 4 where s is the length of any side of the triangle.
Area frac 1 2 base cdot height.
This geometry video tutorial explains how to find the area of a triangle using multiple formulas. The formula for the area of an equilateral triangle with all sides congruent is equal to A s 2 3 4 where s is the length of any side of the triangle. Area of a Triangle from Sides. Area ½ b h ½ 20 12 120.