Parallelograms - Angles

Parallelogram construction
1. Create a line AB[br]2. Plot point anywhere that is not collinear with A and B and rename the point to D[br]3. Construct line that passes through A and D[br]4. Using Parallel Line tool, create a line through B that is parallel to line AD[br]5. Using Parallel Line tool, create a line through D that is parallel to AB[br]6. Create a point of intersection where two lines cross[br]7. Hide all segments and lines. Only points A, B, C, and D should be visible[br]8. Using polygon tool, connect all 4 points thus creating a parallelogram
Using the angle tool, measure interior angles of your polygon by clicking on it. Describe what do you see.
Take any two non-congruent angles and add them. What do you notice?
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Information: Parallelograms - Angles