## Apply scale factor to solve problems involving area and volume. SPI 0706.4.3

## Links verified on 6/11/2014

- Area of an Irregular Rectangle - calculate the area of each figure given
- Areas and Squares - a five question multiple-choice quiz
- Artie Ounces Soda Jerk - interactive game to practice converting ounces to pints and quarts
or- Calculating Areas - a five question multiple-choice quiz
- Calculate the Area of the Rectangle - from FunBrain
- Calculating the Area of a Triangle - from AAA Math
- Dilation - the description of a dilation includes the scale factor and the center of the dilation
- Dilation - definition with a good drawing to illustrate dilation from Wolfram MathWorld
- Dilation of a Polygon - adjust the slider to change the scale factor
- How to Perform Dilations - Math Warehouse provides three clickable animations explaining dilation
- Intuitive Notion of Dilation - definition and several good illustrations to explain the concept of dilation
- Linking Length, Perimeter, Area, and Volume - NCTM lesson plan comparing the perimeter and area ratios of similar rectangles with various scale factors
- Playing with Dilations - an interactive applet from the National Library of Virtual Manipulatives
- Re-roofing Your Uncle's House - [area] Use a built-in tape measure and calculator to calculate the roofing material needed to finish the job. [area of trapezoids involved]
- Scaling Away - Students will measure the dimensions of a common object, multiply each dimension by a scale factor, and examine a model using the multiplied dimensions.
- Solving Proportions - This lesson presents solving proportions by using cross product to find unknown terms
- Scale Drawings - [follow up for Solving Proportions] After you understand proportions, try the lesson on making scale drawings
- Spy Guys Interactive - Relating Area and Perimeter -
Video Lesson- Spy Guys Interactive - Surface Area -
Video Lesson- Spy Guys Interactive - Volume and Displacement -
Video Lesson- Understanding Scale Factors - Similar Triangles: Perimeters and Areas - When two triangles are similar, the reduced ratio of any two corresponding sides is called the scale factor of the similar triangles
- Using Spreadsheets to Find Area and Perimeter - The cells of a spreadsheet are a useful way to represent
andareaperimeter.

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