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Illustrative Math
Grade 8
Let’s find ways to test congruence of interesting figures.
Illustrative Math Unit 8.1, Lesson 13 (printable worksheets)
The following diagrams describe how to decide using rigid transformations whether or not two figures are congruent.
Trapezoids ABCD and A’B’C’D' are congruent.
Are any of the ovals congruent to one another? Explain how you know.
You can use 12 toothpicks to create a polygon with an area of five square toothpicks, like this: Can you use exactly 12 toothpicks to create a polygon with an area of four square toothpicks?
Here are two congruent shapes with some corresponding points labeled.
Here are two faces, Max and Frankie. Are these faces congruent? Explain your reasoning.
The Open Up Resources math curriculum is free to download from the Open Up Resources website and is also available from Illustrative Mathematics.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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