## Area Tool

Grade:

6-8

Standards:

Math Content:

Geometry

Use this tool to determine how the length of the
base and the height of a figure can be used to determine its area. Can you find
the similarities and differences between the area formulas for trapezoids,
parallelograms, and triangles?

**Modes**: Investigate trapezoids, parallelograms, and triangles, using the tabs along the top of the frame. Drag the vertices to explore different sizes of each shape.- The
**Add to Table**button can be used to record data in the table, which may be useful in trying to identify patterns. - The
**lock**button, located at the lower right-hand corner of the interactive, will lock and unlock the height of the polygon. This may be useful in finding the formula for a polygon's area.

Investigate various sizes for each of the
different shapes.

- What is the formula for finding the area of a trapezoid? How is the length of the mid-line involved in the formula?
- What is the formula for finding the area of a parallelogram? How is it related to the formula for finding the area of a rectangle?
- What is the formula for finding the area of a triangle? How is it related to the formula for finding the area of a rectangle?