Note: I recommend that this page be printed out, so that the instructions are easier to follow.
In order to successfully complete a proof,
it is important to think of the definition and the construction
of a rectangle.
In the following outline, I will provide the statements, you provide the reasons.
Prove: If a quadrilateral is a rectangle, then the measure of each angle of the rectangle is 90.
Given: Rectangle ABCD.
Prove: Angles BAD = 90, CBA = 90, DCB = 90, and ADC = 90.
If you have any questions while trying to complete this investigation, or suggestions that would be useful, especially for use at the high school level, please send e-mail to firstname.lastname@example.org.
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