SolveMyMaths Action 1!
Creation of this applet was inspired by a [url=https://twitter.com/solvemymaths/status/934145310074507264]tweet[/url] from [url=https://twitter.com/solvemymaths]Ed Southall[/url]. [br][br]Feel free to move the vertices of the [b][color=#38761d]green triangle[/color][/b] anywhere you'd like. [br][b][color=#1e84cc]You can also alter the size of the interior angle with blue vertex using the blue slider. [/color][/b][br][br][color=#9900ff][b]How can we formally prove what this applet informally illustrates?[/b][/color]