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4. Isosceles Triangle An isosceles triangle has 1 line of symmetry.
It is the bisector of the angle included
between two equal sides.

5. Rectangle A rectangle has 2 lines of symmetry. Two of
these lines are perpendicular bisectors of
opposite sides and passing through the mid
points.

6. Square A square has 4 lines of symmetry. Two of
these lines are perpendicular bisector of
opposite sides and passing through the mid
points. The other two lines of symmetry are
the diagonals.

7. Rhombus These are the diagonals of rhombus.
A rhombus has 2 lines of symmetry.

8. Kite It is the line joining the opposite vertices.
A kite has 1 line of symmetry.

9. Isosceles Trapezium An isosceles trapezium has 1 line of
symmetry. It is the line joining the mid
points of its parallel sides.

10. Semicircle A semicircle has 1 line of symmetry. It is the
perpendicular bisector of the diameter.

11. Circle A circle has infinite number of lines of
symmetry, all lines are the secants passing
through its centre.

243 Symmetry