# Bases and Heights of Parallelograms   Knowing the Base of a Parallelogram. • Drag F to create a family of parallelograms with the same base and the same height.​
• Drag E along the line to create a family of parallelograms with the same height.  Measuring the Height of a Parallelogram. • Click on the point tool and create a point on the length of the parallelogram.​
• Create another point directly opposite the point you created. ​
• Create a third point at a vertex of the figure.​
• Use the segment tool to connect the first 2 points you created.​
• Use the angle tool to measure the insert the angle the segment makes with the base. Start from the last point and move clockwise.​
• Adjust the vertical line to make 90 degrees with the base.​
• Click on the distance tool and measure the height of the figure.   (A). Study the parallelograms below and answer the following question. You can click on the (+) to enlarge the figures if necessary. (B). Study the examples and non-examples of bases and heights of parallelograms below.

• Examples: The dashed segments in these drawings represent the corresponding height for the given base.
• Non-examples: The dashed segments in these drawings do not represent the corresponding height for the given base.

Select all the statements that are true about bases and heights in a parallelogram.      (1). For each parallelogram here, use the SEGMENT tool to construct its base and height. Drag a label next to each segment to denote what it represents.

(2). For the parallelograms above, record these lengths in the table below. In the last row, write an expression (using b and h) for the area of any parallelogram.