The DAV Class 7 Maths Book Solutions and DAV Class 7 Maths Chapter 13 Worksheet 1 Solutions of Symmetry offer comprehensive answers to textbook questions.
DAV Class 7 Maths Ch 13 WS 1 Solutions
Question 1.
Make any two ink-dot designs.
Answer:
Take a piece of paper and put some ink drops on it. Now, fold the paper and press two parts against each other. You will get ink-drt design.
Question 2.
Make any two symmetrical paper cut designs.
Answer:
Question 3.
Mark the corresponding holes for the given line of symmetry in the following figures.
Answer:
Question 4.
Write three letters of English alphabet each having the following number of lines of symmetry,
(i) one line of symmetry.
Answer:
(ii) two lines of symmetry.
Answer:
Question 5.
Write five letters of English alphabet having no line of symmetry.
Answer:
F, G, N, P, Q, J, K, S, Z
Question 6.
Draw the line of symmetry for the following figures.
Answer:
DAV Class 8 Maths Chapter 13 Worksheet 1 Notes
A figure is said to be symmetrical about a line if it is folded about that line, the two part cover completely each other.
Example:
The above figures are symmetrical about the line l.
The line of symmetry of a line segment is perpendicular bisector of the line.
A line has infinitely many lines of symmetry.
The line of symmetry of an angle is the bisector of the angle itself.
A regular polygon of n sides has i lines of symmetry.
There are infinite number of lines of symmetry of a circle. Infact each diameter of a circle its line of symmetry.
