This easy-level worksheet has students fix sentence errors, fill in blanks, and write short answers to practice lines and symmetry skills.
It includes 9 questions across 3 sections for focused practice.
Style:
Lines and Symmetry
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
An equilateral triangle has only 1 line of symmetry because it has 3 sides.
Rewrite: An equilateral triangle has 3 lines of symmetry, one from each vertex to the midpoint of the opposite side.
2. Fix the sentence:
Intersecting lines must always form right angles.
Rewrite: Intersecting lines cross at a point but do not always form right angles. Only perpendicular lines form right angles.
3. Fix the sentence:
A line and a ray are the same thing because they both go on forever.
Rewrite: A line goes on forever in both directions, but a ray has one endpoint and goes on forever in only one direction.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. When two lines cross at one point, they are called intersecting lines.
2. A regular hexagon has 3 pairs of parallel sides.
3. The letter W has 1 line(s) of symmetry.
4. A point marks an exact location in space and has no size.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Name two objects in a classroom that show perpendicular lines.
The edges where a wall meets the floor form perpendicular lines, and the corner of a book where two sides meet also shows perpendicular lines.
2. Why does a scalene triangle have zero lines of symmetry?
A scalene triangle has all three sides of different lengths, so there is no line you can fold along to make both halves match exactly.
Lines and Symmetry
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
An equilateral triangle has only 1 line of symmetry because it has 3 sides.
Rewrite: An equilateral triangle has 3 lines of symmetry, one from each vertex to the midpoint of the opposite side.
2) Fix the sentence:
Intersecting lines must always form right angles.
Rewrite: Intersecting lines cross at a point but do not always form right angles. Only perpendicular lines form right angles.
3) Fix the sentence:
A line and a ray are the same thing because they both go on forever.
Rewrite: A line goes on forever in both directions, but a ray has one endpoint and goes on forever in only one direction.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) When two lines cross at one point, they are called intersecting lines.
2) A regular hexagon has 3 pairs of parallel sides.
3) The letter W has 1 line(s) of symmetry.
4) A point marks an exact location in space and has no size.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Name two objects in a classroom that show perpendicular lines.
The edges where a wall meets the floor form perpendicular lines, and the corner of a book where two sides meet also shows perpendicular lines.
2) Why does a scalene triangle have zero lines of symmetry?
A scalene triangle has all three sides of different lengths, so there is no line you can fold along to make both halves match exactly.
Ready to Practice?
Complete each section carefully.
9 Questions
15-20 minutes
Auto-graded
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