Education Technology

# Activities

• ##### Subject Area

• Math: Middle Grades Math: Geometry
• Math: PreAlgebra: Geometry

6-8

30 Minutes

• ##### Device
• TI-73 Explorer™

## Coordinate Plane

#### Activity Overview

In this activity, students use the pen feature of the calculator to draw geometric shapes in a coordinate plane.

#### Before the Activity

• Set up the calculator as explained in the activity
• See the attached PDF file for detailed instructions for this activity
• Print the pages from the attached PDF file for the class
• #### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Select the Pen feature and place the cursor at (0, 0) in the coordinate plane
• Use the arrow keys and move the cursor to the desired point
• Use the pen feature to draw line segments and complete the figure
• Describe the shape and the location of the figure
• Find what a similar geometric shape would look like
• Write the characteristics of a similar shape on paper and then draw the shape on the coordinate plane alongside the original drawing
• Use the Pen feature to draw a square
• Use the Pen feature to find the coordinates of the point that is 5 to the left of and 20 up from point (15, -11)
• #### After the Activity

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary