Take this 10-question quiz on lines of symmetry. Pick the best answer. Some questions show a picture with a dashed line. The explanations tell how to check by folding and point out common mistakes, like counting the diagonals of a rectangle.
Grade 4 · Common Core State Standards: 4.G.A.3
Remember
A line of symmetry splits a figure into two matching halves.
A square has 4 lines of symmetry, a rectangle has 2, and an equilateral triangle has 3.
A regular polygon with n sides has n lines of symmetry.
Some figures, like a slanted parallelogram, have no lines of symmetry.
Check by folding: the edges and corners must line up exactly.
Download PDFDownload the 4th Grade Lines of Symmetry Quiz: 10 Questions with Explanations (PDF, 52 KB)
