Determine whether [math]\triangle ABC[/math] with vertices [math]A (–4, 5)[/math], [math]B (–1, –4)[/math], and [math]C (5, 2)[/math] is an isosceles triangle. If it is isosceles, name a pair of congruent angles.
[list=1] [*]Use the distance formula to calculate the length of each side. [*]Determine if the triangle is isosceles. [*]Identify congruent angles. [/list] This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on their resources.