Graphing
Calculator
Math
Worksheets
Scientific
Calculator
Chart
Maker


Home
Graphing Calc
Algebra
Fun Games
Geometry
Interactive
Trigonometry
Scientific Calc
Home
Graphing Calc
Algebra
Fun Games
Geometry
Interactive
Trigonometry
Scientific Calc

Prove Triangle Is Isosceles using Coordinate Geometry

An isosceles triangle has 2 congruent sides and two congruent angles. The easiest way to prove that a triangle is isosceles using coordinate geometry is to use the sides.

Steps to Coordinate Proof

Given the coordinates of the triangle's vertices, to prove that a triangle is isosceles
Practice Problem 1) The coordinates of triangle BCD are B(8,2), C(11,13) and D(2,6) Using coordinate geometry, prove that triangle BCD is an isosceles triangle.
Step 1) Plot Points
Practice Problem 2) Triangle ABC has coordinate A(-2,3) , B (-5,-4) and C (2,-1) Using coordinate geometry, prove that triangle BCD is an isosceles triangle.
Step 1) Plot Points