Investigate the properties of parallelograms.
1. Check and uncheck boxes to show different measurements on the parallelogram. 2. Drag the vertices to change the size of the parallelogram. 3. Look for invariants. What is always true even when you change the parallelogram? 4. Write down at least 3 observations (use precise, academic language!). 5. Choose one observation, and write it as a conditional statement ("if.... then.....").