[color=#0000ff][b]Theorem: [/b][/color][br][br]If two lines [b]are perpendicular, [/b]then they cross to form [b][color=#ff00ff]congruent, adjacent angles[/color][color=#666666]. [br][/color][/b](Note that this is the CONVERSE of [url=https://www.geogebra.org/m/jUKH5AYj]this theorem[/url].) [br][br][br]Write a 2-column (or paragraph) proof that formally proves what this applet informally illustrates. [br][i][color=#cc0000]Be sure to set up an appropriate diagram, state what is given, and state what needs to be proven. [br]Then prove it! [/color][/i][br]