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Florida Grade 2 Math · Geometric Reasoning

MA.2.GR.1.3: Lines of Symmetry

What this Grade 2 benchmark means, worked examples, common mistakes, and a free printable worksheet.

Created by a Florida mom · Published by Tropical Learning LLC

Download Free Worksheet (PDF)See worked examples

What Is Benchmark MA.2.GR.1.3?

A line of symmetry divides a figure into two halves that match exactly, like folding a paper so both sides line up perfectly.

Students find lines of symmetry in two-dimensional figures and decide whether a given line is a line of symmetry. This connects to splitting shapes into equal halves.

Official benchmarkIdentify line(s) of symmetry for a two-dimensional figure.

How it is tested: Grade 2 students take FAST Star Math, Florida's math test for Kindergarten through Grade 2.

Worked Examples

Worked Example 1

Lines of Symmetry in a Rectangle

How many lines of symmetry does a rectangle that is not a square have?
  1. 1Fold it in half from top to bottom: the halves match.
  2. 2Fold it in half from side to side: the halves match.
  3. 3Fold it corner to corner: the halves do not match.
Answer: 2 lines of symmetry

Worked Example 2

Lines of Symmetry in a Square

How many lines of symmetry does a square have?
  1. 1A square can be folded top to bottom and side to side.
  2. 2Because all its sides are equal, it can also be folded along both corner-to-corner lines.
  3. 3That makes 4 folds where the halves match.
Answer: 4 lines of symmetry

Common Mistakes to Watch For

Thinking any line through the middle is a line of symmetry

Wrong:The corner-to-corner line of a long rectangle is a line of symmetry.

Fold a long rectangle corner to corner and the halves do not line up. It is not a line of symmetry.

Stopping after finding one line

Wrong:A square has only 1 line of symmetry.

Check every way to fold it. A square has 4 lines of symmetry.

Helpful Math Tip

Fold paper shapes and letters to test for symmetry. If the two halves match exactly when folded, the fold is a line of symmetry.

Related Grade 2 Skills

MA.2.FR.1.1

Halves, Thirds, and Fourths

MA.2.GR.1.2

Sorting Shapes by Attributes

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Independent Educational Platform. FastChomp is published by Tropical Learning LLC and is not affiliated with, sponsored by, or endorsed by the Florida Department of Education. FAST and Star assessment names are referenced for informational purposes only. FastChomp practice questions are original educational materials, not official Florida FAST assessment questions.