Unit 7, Section A
Reason with Shapes
Grade 3
Practice
Problem 1
Pre-unit
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Which shapes are hexagons? ____________________
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Draw a quadrilateral and label it Q. Draw a pentagon and label it P.
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Problem 2
Pre-unit
- Finish covering the rectangle with equal-size squares.
- Write an addition equation showing how many small squares there are in the rectangle.
- Write a multiplication equation showing how many small squares there are in the rectangle.
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Problem 5
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Which shapes have 5 angles? ____________________
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Which shapes have all equal side lengths? ____________________
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Which triangles have 1 right angle? ____________________
- Which triangles have 2 equal side lengths? ____________________
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Problem 7
One of these quadrilaterals is Diego’s mystery quadrilateral.
List some questions you would ask to identify Diego’s mystery quadrilateral. How would the answers help you figure out which quadrilateral it is?
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Select all of the quadrilaterals that are rectangles.
Problem 9
- Draw a quadrilateral that is not a rhombus and label it A. Explain why your shape is not a rhombus.
- Draw a quadrilateral that is not a rectangle and label it B. Explain why your shape is not a rectangle.
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Problem 10
Exploration
Find 1 of each of the following shapes in the image.
- a triangle with a right angle
- a triangle with 3 equal sides
- a rhombus
- a rectangle
- a square
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Problem 11
Exploration
Do any of the triangles have:
- 1 right angle?
- 2 equal sides?
- 3 equal sides?
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