Rotational Symmetry

Q.

The alphabet "H" has rotational symmetry of order

1. 4

2. 1

3. 2

4. 3

Q. Find the order of rotational symmetry of a semi circle.

1. 0
2. 2
3. 1
4. 3

Q. Order of rotational symmetry is the number of times an object looks exactly the same in a complete turn of _________

1. ${360}^{\circ }$
2. ${180}^{\circ }$
3. ${90}^{\circ }$
4. ${60}^{\circ }$

Q. In each of the following figures, draw all possible lines of symmetry and also write the order of rotational symmetry:

Q. Question 1
Name any two figures that have both line symmetry and rotational symmetry.

Q.

Order of rotational symmetry of an equilateral triangle about the centroid of the triangle is ____.

___

Q.

Order of rotational symmetry for a scalene triangle is ___.

Q. Question 2 (i)
Draw, wherever possible a rough sketch of:
i) A triangle with both line and rotational symmetries of order more than 1.

Q. Draw the lines of symmetry of the following figures.

Q. If a figure is rotated ($<{360}^{\text{o}}$) around a point of rotation and it still appears exactly as it was before the rotation, it is said to have

1. Rotational symmetry
2. Horizontal symmetry
3. Vertical symmetry

Q. Which of the following geometrical shape has only line symmetry not rotational symmetry?

1. Parallelogram
2. Pentagon
3. Square
4. Kite

Q.

If a fan has rotational symmetry of order 4, then how many blades does it have?

1. 5

2. 2

3. 3

4. 4

Q.

Draw wherever possible, a rough sketch of a quadrilateral with a rotational symmetry of order more than $1$ but not a line symmetry.

Q.

State whether the given statement is true or false.
Letters H, O and Z have both line symmetry and rotational symmetry.

1. False

2. True

Q. What is the angle and order of rotational symmetry of a circle?

Q.

A transformation that turns the object about a fixed point in a given direction is called

1. Rotation

2. Reflection

3. Translation

4. None of These

Q. What is the order of rotational symmetry of an equilateral triangle?

Q.

Order of rotational symmetry of an equilateral triangle about the centroid of the triangle is ___.

Q. Given cross shaped object can be rotated times during a full rotation of ${360}^{\text{o}}$ to make it look similar as its original shape.

Q.

If a figure is rotated by 180^o the figure looks exactly same then it has rotational symmetry of order ______ .

1. 3

2. 4

3. 1

4. 2

Q.

The order of rotational symmetry of a square about its centre is __.

Q. Atleast One angle of rectangle is always ...........