Symmetry - Free MCQ Practice Test with solutions, CTET Mathematics & Pedagogy

An isosceles triangle has exactly two sides of equal length it has just 1 line of symmetry that runs from the vertex between the two sides of equal length to the midpoint of the side opposite that vertex.

An equilateral triangle has 3 lines of symmetry

 A general parallelogram has no lines of symmetry. Some special ones (rhombus, rectangle, square) have lines of symmetry. 

In case of standard form of mirror image i.e., when the mirror is placed vertically, the object gets laterally inverted. In order words, the Left Hand Side (LHS) and Right Hand Side (RHS) of an object interchange their places while top and button remain the same.

For the square, it can be folded in half over either diagonal, the horizontal segment which cuts the square in half, or the vertical segment which cuts the square in half. So the square has four lines of symmetry.

Lines of symmetry in a rhombus = 2

A rhombus has two lines of symmetry that run through one vertex to the one directly across it. Unlike a square, planes through the center of each edge of a rhombus do not yield mirrored sides.

C and B has Horizontal line of symmetry ,Q has no line of symmetry and V has vertical line of symmetry .

If you draw a line between A you see both the sides equal.

Rectangle have 2 lines of symmetry

The order of rotational symmetry is the number of distinct orientations in which a figure coincides with itself during a full 360° rotation.

For a general parallelogram, a rotation by 180° about the centre maps it onto itself, but a rotation by 90° does not.

Therefore there are two such orientations: 0° (identity) and 180°, so the order of rotational symmetry is 2.