Square, rectangle, and rhombus are the quadrilaterals which have both line and rotational symmetry of order more than 1.
A square has 4 lines of symmetry and rotational symmetry of order 4.
A rectangle has 2 lines of symmetry and rotational symmetry of order 2.
A rhombus has 2 lines of symmetry and rotational symmetry of order 2
Shape | Centre of Rotation | Order of Rotation | Angle of Rotation |
---|---|---|---|
Square | |||
Rectangle | |||
Rhombus | |||
Equilateral Triangle | |||
Regular Hexagon | |||
Circle | |||
Semi-circle |
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |