Assess Readiness
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What do you notice about all of the shapes in part A? What are all of these shapes called?
They all have 4 sides, 4 corners, 2 sides with the same length, and 2 other sides with the same length. They are all rectangles.
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What do you notice about all of the shapes in part B? What are all of these shapes called?
They all have 4 equal sides that are the same. They also have 4 corners. They are all called squares.
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The shapes in part C are called triangles. They are different sizes and colors. What makes them all triangles?
They all have 3 straight sides and 3 angles.
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Look at the shapes in part D. Which shapes are not triangles? How do you know?
Shape 1, shape 3, shape 4, and shape 6 are not triangles. Shape 1 is not closed. Shape 3 has 1 curved side. Shapes 4 and 6 have 4 sides.
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