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Back to Exercise: Recognize a line of symmetry for a two-dimensional figure

Exercises: Recognizing and Drawing Lines of Symmetry

Work through each section in order. For every figure, apply the fold test: if you folded
the figure along the line, would the two halves match exactly? Equal-looking pieces are
not enough -- they must be mirror images.

Grade 4·25 problems·~35 min·Common Core Math - Grade 4·standard·4-g-a-3
Work through problems with immediate feedback
A

Recall / Warm-Up

These problems review shape vocabulary from 4.G.A.1 and 4.G.A.2.

1

Which type of triangle has three sides of different lengths?

2

What type of angle is shown?

3

Which statement correctly describes a square?

B

Fluency Practice

1

The heart shape shown is folded exactly along the dashed vertical line, and the two
halves land on top of each other and match exactly. Is the dashed line a line of
symmetry for this heart shape?

2

How many lines of symmetry does the square shown have in total?

3

How many lines of symmetry does the scalene triangle shown have?

4

How many lines of symmetry does the equilateral triangle shown have?

5

How many lines of symmetry does the rectangle shown have? Remember: a line only
counts if folding along it makes the two halves match exactly.

6

How many lines of symmetry does the regular hexagon shown have?

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