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# Symmetry review

Review symmetrical shapes and lines of symmetry.  Then, try some practice problems.

## Line of symmetry

A start color #1fab54, start text, l, i, n, e, space, o, f, space, s, y, m, m, e, t, r, y, end text, end color #1fab54 is a line where we can fold the image and have both halves match exactly.
Example:
When we divide the figure with Line start color #1fab54, A, end color #1fab54, the resulting two parts are mirror images of each other:
An isosceles triangle with a line labeled A that passes through the vertex joining the equal length sides to the center of the third side.
Line start color #1fab54, A, end color #1fab54 is a line of symmetry.

## Symmetrical figures

Shapes are start color #aa87ff, start text, s, y, m, m, e, t, r, i, c, a, l, end text, end color #aa87ff if they have at least one start color #1fab54, start text, l, i, n, e, space, o, f, space, s, y, m, m, e, t, r, y, end text, end color #1fab54 on them.
Example:
This shape is start color #aa87ff, start text, s, y, m, m, e, t, r, i, c, a, l, end text, end color #aa87ff:
A shape with five sides of equal lengths and all equal angles.
Because we can draw at least one start color #1fab54, start text, l, i, n, e, space, o, f, space, s, y, m, m, e, t, r, y, end text, end color #1fab54 on it:
The same five-sided shape with five lines of symmetry, each cutting it in half through the center point.