Students complete nine problems about parallel sides in squares and trapezoids and symmetry lines in a regular octagon. The matching activity pairs square, equilateral triangle, rectangle, and scalene triangle with their symmetry line counts of 4, 3, 2, and 0.
Matching shapes to symmetry counts requires students to reason about whether each possible fold line produces two perfectly congruent halves.
Style:
Lines and Symmetry
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A square has 2 pairs of parallel sides.
2. A trapezoid has 1 pair(s) of parallel sides.
3. A regular octagon has 8 lines of symmetry.
4. The opposite sides of a rectangle are both parallel and equal.
5. A scalene triangle has 0 lines of symmetry.
6. Perpendicular lines create four right angles at their intersection.
7. The letter X has 2 lines of symmetry.
8. A parallelogram has 0 lines of symmetry.
9. A line of symmetry is also called a line of reflection.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Square
→ 4 lines of symmetry
3 lines of symmetry
Equilateral triangle
→ 3 lines of symmetry
0 lines of symmetry
Rectangle
→ 2 lines of symmetry
4 lines of symmetry
Scalene triangle
→ 0 lines of symmetry
2 lines of symmetry
Lines and Symmetry
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) A square has 2 pairs of parallel sides.
2) A trapezoid has 1 pair(s) of parallel sides.
3) A regular octagon has 8 lines of symmetry.
4) The opposite sides of a rectangle are both parallel and equal.
5) A scalene triangle has 0 lines of symmetry.
6) Perpendicular lines create four right angles at their intersection.
7) The letter X has 2 lines of symmetry.
8) A parallelogram has 0 lines of symmetry.
9) A line of symmetry is also called a line of reflection.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Square
→ 4 lines of symmetry
3 lines of symmetry
Equilateral triangle
→ 3 lines of symmetry
0 lines of symmetry
Rectangle
→ 2 lines of symmetry
4 lines of symmetry
Scalene triangle
→ 0 lines of symmetry
2 lines of symmetry
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
Auto-graded
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