Printable worksheet designed to help students practice identifying lines of symmetry in various shapes and everyday objects.

To find the lines of symmetry, imagine folding each shape in half. If the two halves match perfectly, that fold line is a line of symmetry. Here is the breakdown for each shape:

Row 1:
1. Fish Skeleton: This shape has a horizontal line of symmetry running through the middle from head to tail. The top half mirrors the bottom half.
2. Fish Bowl: There are no lines of symmetry. The fish is only on one side, and the water level makes the top different from the bottom.
3. Crescent Moon: This has one diagonal line of symmetry. It runs from the top-left tip to the bottom-right tip (or vice-versa depending on orientation), splitting the curve evenly.

Row 2:
4. Key: There are no lines of symmetry. The handle is round but the bit at the end is only on the bottom.
5. Zig-Zag Arrow: This shape has one horizontal line of symmetry running through the center. The top point mirrors the bottom point.
6. Pentagon: Assuming this is a regular pentagon (all sides equal), it has 5 lines of symmetry. Each line goes from a corner to the middle of the opposite side.

Row 3:
7. Lightbulb: This has one vertical line of symmetry running straight down the middle. The left side matches the right side.
8. House Shape (Pentagon): This has one vertical line of symmetry running from the top peak down to the middle of the bottom base.
9. Star: A standard 5-pointed star has 5 lines of symmetry. Each line goes from an outer point through the center to the inner corner opposite it.

Row 4:
10. Heart in Square: The heart itself has one vertical line of symmetry. However, look closely at the pink background pattern. The tiny hearts in the background are tilted or arranged in a way that usually breaks perfect symmetry unless they are perfectly mirrored. In most worksheets like this, if the main object (the white heart) is symmetrical, we count that. But strictly speaking, if the background pattern doesn't mirror, it has none. *Correction:* Looking at standard primary school logic, they usually focus on the main geometric form. The white heart has 1 vertical line of symmetry. Let's assume the question asks about the main shape.
11. Honeycomb Rectangle: This rectangle filled with hexagons has 2 lines of symmetry: one vertical down the middle and one horizontal across the middle.
12. Octagon: A regular octagon has 8 lines of symmetry. Lines go from corner to opposite corner and from mid-side to opposite mid-side.

Row 5:
13. Triangle: This looks like a scalene triangle (all sides different lengths). Scalene triangles have 0 lines of symmetry.
14. Hexagon: A regular hexagon has 6 lines of symmetry.
15. Cross: This shape has 4 lines of symmetry: one vertical, one horizontal, and two diagonals.

***

Final Answer:

Here are the number of lines of symmetry for each shape:

* Fish Skeleton: 1 line (horizontal)
* Fish Bowl: 0 lines
* Crescent Moon: 1 line (diagonal)
* Key: 0 lines
* Zig-Zag Arrow: 1 line (horizontal)
* Pentagon: 5 lines
* Lightbulb: 1 line (vertical)
* House Shape: 1 line (vertical)
* Star: 5 lines
* Heart: 1 line (vertical)
* Honeycomb Rectangle: 2 lines (vertical and horizontal)
* Octagon: 8 lines
* Purple Triangle: 0 lines
* Hexagon: 6 lines
* Cross: 4 lines