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Why is this concept useful?: A line of symmetry divides a shape into two parts, each of which is the mirror image of the other.
Where does this concept fit into the curriculum?: Grade 4

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How can we use the concept:

Imagine a shape drawn on a piece of paper and you fold the paper, if both sides of the image match when the paper is folded, the fold would be a line of symmetry. Some shapes do not have a line of symmetry, while others have more than one.

Sample Math Problems

Question

How many lines of symmetry does a square have?

Solution

A square has 4 lines of symmetry. Each square below shows a different line of symmetry.

Question

Is the dotted line shown, a line of symmetry?

Solution

Question

Is the red line shown, a line of symmetry?

Solution

Question

David folds the figure along the dotted line. Will the folded parts match?

Solution

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$8 Math Hacks and Tricks to Turn Your 'Okay' Math Student Into a Math Champion!$

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Practice Math Problems

1.) How many lines of symmetry does a rectangle have?

2.) Is the dotted line shown, a line of symmetry?

3.) Is the dotted line shown, a line of symmetry?

4.) Mary folds the figure along the dotted line. Will the folded parts match?

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Geometry Worksheets

Line of Symmetry

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Normal Distribution

Tossing a Coin

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Math Tutoring to Boost Your Child’s Math Skills & Scores by 90% in Just 3 Months – Guaranteed!

Sample Math Problems

Download FREE Math Resources

8 Math Hacks and Tricks to Turn Your 'Okay' Math Student Into a Math Champion!

How to Make Sure Your Child is Highly Successful and Becomes a Millionaire

Practice Math Problems