4th Grade Lines of Symmetry Test Solutions and Scoring (PDF)

1. A kite folds along its long diagonal so the halves match: yes.
2. A slanted parallelogram has no fold that makes the halves match: no.

Scoring: 1 point for each correct answer.

1. 2 lines
2. 3 lines

Scoring: 1 point for each correct answer.

The five lines each join a corner to the middle of the opposite side.

Scoring: 1 point for drawing at least 3 correct lines, 2 points for all 5 correct lines and no incorrect lines.

A, H, and M can be cut into matching left and right halves by a vertical line.

A, H, M

Scoring: 2 points for all three letters with no extra letters. 1 point for two correct letters, or for all three plus one extra.

Each corner on the left matches a corner on the right at the same distance from the dashed line.

Scoring: 1 point for correct corners on the right half, 1 point for matching heights, and 1 point for joining the corners in the correct order.

(a) 1 line. (b) A regular hexagon has 6 sides, so 6 lines. (c) No fold matches, so 0 lines.

(a) 1 (b) 6 (c) 0

Scoring: 1 point for each correct number.

1. 8 sides, so 8 lines
2. 3 sides, so 3 lines
3. \(8 – 3 = 5\), so 5 more lines

Scoring: 1 point for each correct part.

Mei is not right. A square has 4 lines of symmetry, but a rectangle that is not a square has only 2, and a slanted parallelogram has 0.

No, she is not right.

Scoring: 1 point for saying she is not right, 1 point for a correct example with the right number of lines, 1 point for a second correct example.