A rectangle has two lines of symmetry, one vertical line and one horizontal line, which divide it into identical mirrored halves.

Understanding Symmetry in a Rectangle
A rectangle is a four-sided shape (quadrilateral) with opposite sides that are equal in length and four right angles. When we talk about symmetry, we refer to the ability of a shape to be divided into two identical halves that are mirror images of each other.
Lines of Symmetry Defined
- A line of symmetry is a line that divides a shape into two identical parts.
- If you were to fold the shape along this line, both halves would match perfectly.
Lines of Symmetry in a Rectangle
- A rectangle has two lines of symmetry:
- Vertical Line of Symmetry: This line runs down the center of the rectangle, dividing it into two equal halves. If you fold the rectangle along this line, the left side will match the right side.
- Horizontal Line of Symmetry: This line runs across the center of the rectangle, dividing it into top and bottom halves. Folding along this line will have the top half matching the bottom half.
Conclusion
- Therefore, the correct answer is option B (2).
- A rectangle does not have four, five, or one line of symmetry, as only the two mentioned lines create perfect mirror images when folded.
Understanding these concepts helps students grasp basic geometric principles and recognize symmetry in various shapes.