This document discusses the concept of symmetry and lines of symmetry. It provides examples of cutting different shapes, like rectangles and triangles, into two equal parts that are mirror images of each other along a line. Students are assigned homework to find the lines of symmetry for various shapes.

1. Symmetry

2. Is there a way we can
cut this figure into
two equal parts?

3. You can cut this figure
in half to create two
identical figures.

4. This line will create
two figures of the
same size and shape.

5. Is there another way I
can cut this shape in
two equal parts?

6. This line will also
create two rectangles
of equal size and
shape.

7. The yellow and pink
rectangles are of
identical shape and
size.

8. We would say these
are
Lines of
Symmetry

9. Symmetry
Dividing a solid shape into two
parts so that one part is the mirror
image of the other.

10. The pink rectangle is a
mirror image of the
yellow rectangle in
shape and size.
Line of
Symmetry

11. How many lines of symmetry are there
for this triangle?

12. How many lines of symmetry are there
for this shape?

13. Homework Assignment: Find the lines of symmetry for
these shapes.
Name: ______________________

14. Find the lines of symmetry.