Use the buttons, in order, to show how to drop a perpendicular line. (See the Exploration section for details.) The Measure button can be used to measure the angle formed by the original line and the line constructed.
The Start Over button will reset the entire drawing.
To drop a perpendicular line, perform the following steps:
To prove that this construction works, show that PQ is perpendicular to the given line. Click the Why It Works button to draw in some segments that will help with the proof.
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