Math Practice 101
Homework Explained - Math Practice 101

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Grade 3 Go Math Practice - Answer Keys
Common Core


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Same Size, Same Shape

Essential Question How can you identify shapes that have the same size and are shaped the same?

UNLOCK the Problem

You can tell if two shapes have the same size and are shaped the same by comparing the matching parts of the shapes.

Activity

Compare size an shape

Materials ∗ grid paper ∗ scissors ∗ ruler

STEP 1 Trace Shape A on grid paper. Cut out Shape A.

STEP 2 Move Shape A in any way to compare it to Shape B.

  • Question 1 (request help)
  • Do the shapes match exactly?    
    		-- Shape A and Shape B     the same size and
    		    shaped the same.

STEP 3 Move Shape A in any way to compare it to Shape C.

  • Question 2 (request help)
  • Do the shapes match exactly?    
    		-- Shape A and Shape C     shaped the same.

Try This!

Since all the angles in Shapes A and B are the same, you can compare shapes by their matching sides.

  • Question 3 (request help)
  • The length of the shorter side of Shape A is     units.
    The length of the shorter side of Shape B is     units.
    The length of the longer side of Shape A is     units.
    The length of the longer side of Shape B is     units.
    So, Shape A and Shape B have the     size
    and are shaped the    

 Since all the angles in Shapes A and C are the same, you can compare shapes by their matching sides.

  • Question 4 (request help)

    Explain how the size and shape of Shape A compares to the size and shape of Shape C.
  • The length of the shorter side of Shape A is     units.
    The length of the shorter side of Shape C is     units.
    The length of the longer side of Shape A is     units.
    The length of the longer side of Shape C is     units.
    So, Shape A and Shape C have the     size
    and are shaped the    

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