These Class 7 Maths Extra Questions Chapter 12 Symmetry will help students prepare well for the exams.
Class 7 Maths Chapter 12 Extra Questions Symmetry
Class 7 Maths Symmetry Extra Questions – 2 Marks
Question 1.
A, P
Solution:
A has one line of symmetry
P has no lines of symmetry.
Question 2.
Q, H
Solution:
Q has no lines of symmetry.
H has two lines of symmetry.
Question 3.
M, O.
Solution:
M has one lines of symmetry.
‘O’ has infinite lines of symmetry.
Question 4.
Z, S.
Solution:
Letter Z has no lines of symmetry.
Letter S has no lines of symmetry.
Question 5.
B, X.
Solution:
Letter B has one lines of symmetry.
Letter X has two lines of symmetry.
Question 6.
Square and Rectangle.
Solution:
Order, of rotation of a Square is 4.
Order of ratation of a Rectangle is 2.
Question 7.
Equilateral triangle and Circle.
Solution:
Order of rotation of an Equilateral triangle is 3.
Order of rotation of a Circle is infinite.
Question 8.
Rhombus, Semi-circle
Solution:
Order of rotation of a Rhombus is 2.
Order of rotation of a Semi-circle is 1.
Question 9.
Square, Circle?
Solution:
Angle of rotation of a Square is 90°.
Angle of rotation of a Circle is any angle.
Question 10.
Rhombus, Semicircle?
Solution:
Angle of rotation of a Rhombus is 180°.
Angle of rotation of a Semicircle is 360°.
Question 11.
Regular hexagon, Rectangle.
Solution:
Angle of rotation of a Regular Hexagon is 60°.
Angle of rotation of a Rectangle is l80°.
Symmetry Extra Questions Class 7 – 3 Marks
Question 12.
Square, Rectangle, Circle.
Solution:
Number of line symmetry for square = 4
Number of line symmetry for rectangle = 2
A circle has infinite lines of symmetry.
Question 13.
Letter C, N and E
Solution:
Question 14.
Equilateral triangle, semicircle.
Solution:
Number of lines symmetry for an equilateral triangle is 3.
Number of lines symmetry for a semi circle is 1.
Question 15.
Question 16.
What is the line of symmetry of a semicircle? Does it have rotational symmetry?
Solution:
The line of symmetry for a semicircle is the perpendicular bisectors of Diameter.
It has no rotational symmetry.
Question 17.
Name any two figures that have both line symmetry and rotational symmetry.
Solution:
An equilateral triangle and square have both line symmetry and rotational symmetry.
Question 18.
Given an example of a letter of the English alphabet which has
i) no line of symmetry and
ii) rotational symmetry of order 2.
Solution:
i) Z
ii) N
Question 19.
Draw the line of symmetry for
i) a kite
ii) an arrow head.
Solution:
Question 20.
Draw line of symmetry for a line segment and an angle. What do you call them?
Solution:
The line of symmetry for a line segment is called its perpendicular bisector.
The line of symmetry for an angle is called the bisector of the angle.