Tell whether each figure has rotational symmetry or not.

Solution:

We know that

Rotational symmetry is defined as a type of symmetry in which the image of a given shape is exactly identical to the original shape or image in a complete turn or a full angle rotation or 360° rotation.

It exists when a shape is turned, and the shape is identical to the original.

By considering this we know that

(a) Yes

(b) No

(c) Yes

(d) Yes

(e) Yes

(f) Yes

Therefore, the figures (a), (c), (d), (e) and (f) have rotational symmetry.

✦ Try This: Draw the net of rectangular pyramid with slant edge 5 cm and base as rectangle with length 3 cm and breadth 2 cm.

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 10

NCERT Exemplar Class 7 Maths Chapter 12 Problem 117

Tell whether each figure has rotational symmetry or not.

Summary:

The figures (a), (c), (d), (e) and (f) have rotational symmetry.

☛ Related Questions:

• Draw all lines of symmetry for each of the following figures
• Tell whether each figure has rotational symmetry. Write yes or no
• Does the Fig. 12.28 have rotational symmetry