Surf for More Math

Lesson 1 - Areas of Polygons

Use this interactive activity to encourage students to have fun on the Web while learning about areas of polygons. Students can try this activity on their own or in pairs.

Goal

Estimate and measure the area of polygons.

Builds Upon

Student Book pages 222-223

Instructions for Use

Touch Pegs prompts students to investigate the area of different shapes.

To use Touch Pegs, select a blue band under "Bands" then drag it to any location on the grid. Release the band to anchor it. A red node appears at the top of the band. Click on any part of the band and drag it in any direction. It will stretch like a rubber band. Release the band to secure it to a point on the grid. Secure the band to other points on the grid to form a shape.

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To colour the area inside the shape, click on the shape's outline and then click one of the colour buttons to the left of the grid.

Calculate the area of the shape you created. Click the "Measures" button to check your answer. Click on the "Clear" button to start the exercise over again.