Surf for More Math
Lesson 5 - Measuring Perimeter
To encourage your child to have fun on the Web while learning about Measuring Perimeter, here are some games and interactive activities they can do on their own or in pairs.
Goal
Estimate, measure, and compare perimeters.
Builds Upon
Student Book pages 114-115
Instructions for Use
Touch Pegs lets your child investigate perimeters of rectangles.
To use Touch Pegs, select a circle by holding the mouse button down, and drag it to any location on the grid. 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 to make rectangles.
Click on the circle again to add other bands. To color the rectangle, click first on it and then on the color buttons to the left. To release a node, hold the Ctrl key down and click on the node. Click on the 'Measure' button to determine the perimeter of the rectangle. Click on the 'Clear' button to start the exercise over again.
Box Perimeter allows your child to investigate perimeters of rectangles.
To use Box Perimeter, drag boxes from the left inside of the window to the workspace and count the edges of each box that are not touching another box. Press the "Show Perimeter" button to check your answer with the computers.
To delete a box drag it off of the screen.
Airlines Builder prompts your child to make rectangles and measure the perimeters.
Drag and drop pieces onto the grid. Rotate pieces to make an enclosed area. Each cyber ship is a different shape. Once the shape is completed, click the 'Done' button.
