This grade 4 lines test answer key gives the full solution and the scoring guide for each of the 9 test questions on lines, angles, shapes and symmetry.
This answer key gives a worked solution and a scoring guide for each of the 9 test questions. Award points exactly as listed, and give partial credit where the guide allows it. The total is 20 points, so a score of 16 or more shows strong understanding.
Grade 4 Lines Test Answer Key: questions 1–5
Question 1: Lines, rays and segments (2 points)
- Figure X has one endpoint and an arrow, so X is a ray. Figure Y has two endpoints, so Y is a line segment.
- Figure Z is a line. It has no endpoints and goes on forever in both directions, so it has no end-to-end length.
Scoring: 1 point for naming both figures correctly; 1 point for saying it has no endpoints or goes on forever.
Question 2: Classify the angles (2 points)
- Angle 1 is smaller than a square corner: acute. Angle 2 has a square corner: right.
- Angle 3 is wider than a square corner but not straight: obtuse.
Scoring: 1 point if both parts of (a) are right; 1 point for (b).
Question 3: Three lines (2 points)
- Lines l and m never meet and stay the same distance apart.
- Line n crosses l and m at square corners.
Scoring: 1 point for each correct answer.
Question 4: Types of triangles (3 points)
- X has one angle wider than a square corner: obtuse.
- Y has a square corner: right.
- Z has three angles smaller than a square corner: acute.
Scoring: 1 point for each correct type.
Question 5: Quadrilaterals (2 points)
- P has 2 pairs of parallel sides and 0 right angles.
- Q has 1 pair of parallel sides (top and bottom) and 2 right angles.
Scoring: for each figure, 1 point if both numbers are right; no point if one is wrong.
Grade 4 Lines Test Answer Key: questions 6–9
Question 6: Counting symmetry (3 points)
- The kite folds down its long diagonal: 1.
- The square: 4.
- The parallelogram: 0.
Scoring: 1 point for each correct count.
Question 7: Complete the figure (2 points)
Each corner on the right is the same distance from the dashed line as its partner on the left. The right half is 4 squares wide at the bottom, 2 squares wide at the middle step, and 1 square wide at the top.
Scoring: 1 point for the correct right-side corners; 1 point for a complete figure with matching heights.
Question 8: Find the mistake (2 points)
- A rectangle that is not a square has only 2 lines of symmetry: one lengthwise and one crosswise. Folding corner to corner does not match.
- A ray has one endpoint and goes on forever, so it has no length. Only a line segment has a length.
Scoring: 1 point for each statement corrected.
Question 9: Maya's triangle (2 points)
No. A triangle with one right angle is a right triangle. An obtuse triangle has an angle wider than a square corner.
Scoring: 1 point for saying she is not correct; 1 point for naming the triangle as a right triangle with a reason.
Scoring summary
20 points: add the points of every question of this grade 4 lines test answer key.
How to use this grade 4 lines test answer key
Use this grade 4 lines test answer key to score the test fairly and to see which skills need more practice.
Printable PDF · Test Answer Key
Grade 4 Lines, Angles, Shapes and Symmetry test answer key
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