Parallelograms - Angles
1. Create a line AB 2. Plot point anywhere that is not collinear with A and B and rename the point to D 3. Construct line that passes through A and D 4. Using Parallel Line tool, create a line through B that is parallel to line AD 5. Using Parallel Line tool, create a line through D that is parallel to AB 6. Create a point of intersection where two lines cross 7. Hide all segments and lines. Only points A, B, C, and D should be visible 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?