Step 1 Remember the formula for finding the perimeter of a triangle. 33333 53 15. The distance formula is used to find the distances between vertices then these distances are used to find the perimeter and area of the triangle.
Formulas for Area and Perimeter Let A xA yA B xB yB and C xC yC be the three vertices defining the triangle.
Multiply the side length by the number of sides to get the perimeter. P 2a b or. The distance formula is used to find the distances between vertices then these distances are used to find the perimeter and area of the triangle. The formula for the perimeter of a rectangle is often written as P 2l 2w where l is the length of the rectangle and w is the width of the rectangle.