# Surf for More Math

## CHAPTER 8: MEASUREMENT

**Lesson 4: Perimeters and Areas of Rectangles **

Use these interactive activities to encourage students to have fun on the Web while learning about measurement. Students can try these activities on their own or in pairs.

**Goal**

Compare rectangles with the same perimeter or the same area.

**Builds Upon**

Student Book pages 264–266

**Instructions for Use**

**Calculate the Area of a Rectangle** allows students to practise calculating the area of rectangles.

Read the instructions, scroll down to the Practice box, and click on “Start.” Calculate area, type your answer in the empty text box, and click “check” to see if you are correct.

**Area Explorer** allows students to practise finding the area of an irregular shape.

You will be given a shape on a grid. Find the area, type your answer in the empty text box, and click on “Check Answer” to see if you are correct.

**Exploring Area** allows students to see how area of a rectangle changes when you change the length and width.

Use the arrows to increase or decrease the length or the width of the rectangle. You will see the are calculation change accordingly.