# Parallelograms - Angles

- Author:
- Mateusz

- Topic:
- Angles, Parallelogram

## Parallelogram construction

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?