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Cogito

Grade 3 Math · Chapter 7 · Lesson 1

Practice Worksheet

The Quadrilateral Family

A square is a rectangle, and both are quadrilaterals.

10 problems · about 13 minutes · 3.G.A.1

NameDate

Figures — use these to answer the problems

A square: 4 equal sides and 4 square corners.

Square

Straight sides

4

Corners

4

Turn it0
Figure 1
A rhombus: 4 equal sides, but the corners are not square.

Rhombus

Straight sides

4

Corners

4

Turn it0
Figure 2

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Line Plots With Fractions”

    Stacks of 2, 3, 4 and 1. How many measurements in all?

    Answer

  2. From “Measuring to Halves and Fourths”

    How many fourths make three quarters?

    Answer

  3. From “Two-Step Graph Problems”

    Bars of 40, 15 and 5. How many more is the first than the other two together?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. How many sides does every quadrilateral have?

    Answer

  2. Can one shape have more than one correct name?

    • Yes. A square is also a rectangle.
    • No. Each shape has one name.

  3. How many sides does a quadrilateral have?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. Is a square a rectangle?

    • Yes. It has 4 square corners.
    • No.

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

3 problems

  1. Is a rhombus a quadrilateral?

    • Yes.
    • No.

  2. Is It a Quadrilateral?

    Is a trapezoid a quadrilateral?

    • Yes. It has 4 sides.
    • No. It has its own name.

  3. The Other Way

    Is every rectangle a square?

    • No. A rectangle can be long and thin.
    • Yes. They are the same.