L Y Q S F C. Class 7 Symmetry. Answer t he quest ions. For more such worksheets visit

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1 ID : in-7-symmetry [1] Class 7 Symmetry For more such worksheets visit Answer t he quest ions (1) Find the order of rotational symmetry in f ollowing image. (2) How many lines of symmetry are there in a rhombus? (3) How many lines of symmetry are there in f ollowing f igure? (4) How many lines of symmetry are there in f ollowing f igure? (5) Find the order of rotational symmetry in f ollowing image. (6) Alisha rolls a cube which has f ollowing letters on each f ace, L Y Q S F C What is the f raction of symmetric (either horizontal or vertical) letters on the cube?

2 (7) How many lines of symmetry are there in f ollowing f igure? ID : in-7-symmetry [2] Choose correct answer(s) f rom given choice (8) Find the order of rotational symmetry in f ollowing image. a. 3 b. 4 c. 6 d. 2 (9) How many lines of symmetry are there in f ollowing f igure? a. 3 b. 1 c. None d. 2 (10) Find the order of rotational symmetry in f ollowing image. a. 9 b. 6 c. 8 d. 10

3 (11) Which pair shows ref lection over line? a. b. ID : in-7-symmetry [3] c. d. (12) What is the order of rotational symmetry in f ollowing image? a. Four b. No symmetry c. Two d. Three (13) In this picture, consider dotted line as mirror and complete the f igure using mirror image on the right side. What is the shape of complete f igure af ter adding mirror image? a. Arc b. Circle c. Chord d. Semi-circle (14) Which of the f ollowing letter has a vertical line of symmetry? a. Y b. Z c. S d. N Fill in the blanks (15) Order of rotational symmetry in f ollowing f igure =

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5 Answers ID : in-7-symmetry [5] (1) 4 4 rotations, the order of rotational symmetry in given image is 4. (2) Two The lines which divides any image into two parts in such a way that they are exact mirror images of each other, are called lines of symmetry. The lines of symmetry f or a rhombus are shown in the image. There are Two lines of symmetry f or a rhombus.

6 (3) 2 ID : in-7-symmetry [6] The lines which divides any image into two pieces which are mirror images of each other, is called lines of symmetry. The all possible lines of symmetry of the given f igure are shown below: Step 3 Now you can say that the number of lines of symmetry in the given f igure are 2. (4) 3 3 rotations, the order of rotational symmetry in given image is 3. (5) 8 8 rotations, the order of rotational symmetry in given image is 8.

7 ID : in-7-symmetry [7] (6) 2 6 Symmetric letter are : C Y Asymmetric letter are : F L Q S Step 3 Total symmetric and asymmetric letter are : 6 Step 4 Now the f raction of symmetric (either horizontal or vertical) letters on the cube = 2 6 (7) 4 The lines which divides any image into two pieces which are mirror images of each other, is called lines of symmetry. f or example the line in the f ollowing triangle is the line of symmetry. Now if you look at the given f igure caref ully, you will notice that the number of lines of symmetry are 4.

8 (8) b. 4 ID : in-7-symmetry [8] 4 rotations, the order of rotational symmetry in given image is 4. (9) c. None The lines which divides any image into two pieces which are mirror images of each other, is called lines of symmetry. f or example the line in the f ollowing triangle is the line of symmetry. Now if you look at the given f igure caref ully, you will notice that the number of lines of symmetry are 0.

9 (10) c. 8 ID : in-7-symmetry [9] 8 rotations, the order of rotational symmetry in given image is 8. (11) b. A ref lection is a f lip over a line. Every point is the same distance f rom the central line and the ref lection has the same size as the original image. Now if you look at the all of the options caref ully, you will notice that the pair which shows ref lection over line is. (12) c. Two two rotations, the order of rotational symmetry in given image is Two.

10 (13) b. Circle ID : in-7-symmetry [10] The shape of complete f igure af ter adding mirror image is like as: Now we can say that the shape of complete f igure af ter adding mirror image is a Circle. (14) a. Y If you draw a vertical line down the middle of a letter, and the two sides are the mirror images of each other, then we can say that the letter has a vertical line of symmetry. Now if you look at the all of the options caref ully, you will notice that if you draw a vertical line down the middle of Y, the two sides will be mirror images of each other and hence you can say that Y has a vertical line of symmetry. (15) 8 8 rotations, the order of rotational symmetry in given image is 8.