Skip to lesson

Choose “Save as PDF” in the print dialog to keep a copy.

Cogito

Grade 4 Math · Chapter 7 · Lesson 6

Practice Worksheet

Lines of Symmetry

A fold that makes both halves match.

10 problems · about 14 minutes · 4.G.A.3

NameDate

Figure — use these to answer the problems

Turn the shape and imagine folding it down the middle.

Hexagon

Straight sides

6

Corners

6

Turn it0
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Sorting Shapes by Their Angles”

    How many right angles can a triangle have?

    Answer

  2. From “Lines, Rays, and Segments”

    At how many degrees do perpendicular lines cross?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. How many lines of symmetry does a square have?

    Answer

  2. How do you test a line of symmetry?

    • Fold along it and see if the halves match.
    • Measure how long it is.

  3. How many lines of symmetry does a rectangle have?

    Answer

  4. How many lines of symmetry does an equilateral triangle have?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. How many lines of symmetry does the letter H have?

    Answer

  2. Does every shape have a line of symmetry?

    • No.
    • Yes.

Stretch Yourself

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

2 problems

  1. The Square

    How many lines of symmetry does a square have?

    Answerlines

  2. The Letter

    How many lines of symmetry does the letter A have?

    Answerlines