# SolveMyMaths Action 1!

Creation of this applet was inspired by a tweet from Ed Southall.
Feel free to move the vertices of the

**green triangle**anywhere you'd like.**You can also alter the size of the interior angle with blue vertex using the blue slider.****How can we formally prove what this applet informally illustrates?**## Quick (Silent) Demo

## New Resources

## Discover Resources

## Discover Topics

Download our apps here: