Learn Class 7 Math - Symmetry

The term symmetry refers to the shape of a particular object divided into equal parts.

In the symmetry form, one half of the mirror image is considered as the other half.

The line of symmetry is a term known as the imaginary axis through which the figure is folded.

Definition

  • The shape of a given object is known as symmetry, which is divided into a different set of parts.
  • Example: When we draw the heart, we usually cut the piece of paper by drawing half of the circle. And later, we cut it into a different set of parts.

A different line of symmetry

The line of symmetry is divided into three different parts. These parts are discussed here below:

  • Vertical line
  • Horizontal line
  • Diagonal line

There are different lines of symmetry, such as one line symmetry, two-line symmetry, and three-line symmetry.

Different types of symmetry

  • Translational symmetry
  • Rotational symmetry
  • Glide symmetry
  • Reflexive symmetry

What is the meaning of point symmetry?

The term point symmetry refers to the object symmetry included with each part of the object. We can see that there are different sets of alphabets that consist of point symmetry.

Learning Videos for 7th Grade Math - Symmetry

Symmetry Sample Questions for Class 7

Question 1

How many sides and angles does an irregular nonagon have?
A. 10 sides and angles
B. 9 sides and angles
C. 6 sides and 7 angles
D. 9 sides and 10 angles

Question 2

Which two angles must have the same measurement?
A. ang1 and ang2
B. ang2 and ang4
C. ang3 and ang2
D. ang4 and ang1

Question 3

Sarah has 3 skirts (black, white and blue) and 3 blouses (red, green and yellow). How many different outfits can she make if each outfit has one skirt and one blouse.
A. 9
B. 6
C. 5
D. 3

Question 4

Which of the following is an example of the distributive property?
A. 20xx1=20
B. 4xx0=0
C. 8+9=9+8
D. 2(4+2)=2(4)+2(2)

Question 5

The commutative property of ADDITION states
A. that you can multiply the factors in any order.
B. that you can divide the numbers in any order.
C. that up can add the numbers in any order.
D. that you can group the numbers in any order.