Mathematics 4

# Lesson 3 - Congruent Shapes

To encourage students to have fun on the Web while learning about Congruent Shapes, here are some games and interactive activities they can do on their own or in pairs.

### Goal

Identify and construct congruent shapes.

### Builds Upon

Student Book pages 186-187

### Instructions for Use

Geoboard allows students to create congruent shapes.

To use Geoboard, select a circle by holding the mouse button down, and drag it to any location on the gird. Release the circle to anchor it. A red node appears at the top of the circle. Click on any part of the circle and drag it in any direction. It will stretch much like a rubber band. Secure the band to any points on the grid. You can make many geometrical shapes.

Click on the circle again to add as many bands as you like. To color the area in the shape, click first on the shape and then on the color buttons to the right. To release a node, hold the Ctrl key down and click on the node. Click on the 'Delete Node' button to delete each node. Click on the 'Delete band' button to delete each rubber band. Click on the 'Clear' button to start the exercise over again.

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