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Using Circle Properties to Construct Regular Polygons

This video explores the ways in which the geometric properties of a circle can be used to create regular polygons. The examples in this video show how to create a square or a regular octagon by dividing a full rotation of 360° by 4 for a square and by 8 for a regular octagon. You can use this method to form any regular polygon from the original circle by dividing by the number of sides of the regular polygon you want to make.

 

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Using Ratios to Compare Situations

In this MathUP video, you will see how double number lines provide a helpful visual when solving problems. The example in this video shows how double number lines can easily represent equivalent ratio values in particular, but you can also use double number lines when working with rates or percents. Students can quickly get the hang of comparing ratios, rates, or percents on a double number line, so we encourage you to introduce this method in your classroom to see results.