Interactive free online graphing calculator from GeoGebra. It will even tell you if more than 1 triangle can be created. You can nudge the most recent addition by using the up down left right keys.
Most often students use the draw a picture strategy to solve problems involving space or organization but it can be applied to almost all math problems.
Online math solver with free step by step solutions to algebra calculus and other math problems. Visit Mathway on the web. It will even tell you if more than 1 triangle can be created. Free graphing calculator instantly graphs your math problems.