Page 193 - Maths Skills - 7

Symmetry 191

4. Write the order of rotational symmetry for the following figures.

ASSESSMENT TIME

COMPETENCY BASED QUESTIONS B. Fill in the Blanks

A. Multiple-Choice Questions 1. The line which divides a given figure into two
1. The letter which has linear symmetry as well as equal halves is called ____________.
rotational symmetry is: 2. A ____________ has four lines of symmetry.
(i) X (ii) Q 3. A rhombus has __________ lines of symmetry.
(iii) P (iv) S 4. Rotational symmetry of order 2 is also referred
2. Which of the following has exactly two lines of to as ____________.
symmetry? 5. When an object is reflected, there is no change

(i) a square (ii) a parallelogram in the ____________.
(iii) a kite (iv) a rectangle C. Write ‘T’ for true and ‘F’ for false statements
3. A regular pentagon has rotational symmetry of 1. A hexagon has four lines of symmetry.
order:
(i) two (ii) four 2. An equilateral triangle has exactly three lines of
(iii) three (iv) five symmetry.

4. The number of times a figure matches itself after 3. All the figures have rotational and linear
rotation is called: symmetry.

(i) axis of symmetry
(ii) rotational symmetry
D. Case Study Based Questions
(iii) order of symmetry Meena and Rachna are two friends. They decided

(iv) reflectional symmetry to research on Maths topic “Symmetry in real
5. A circle has life”. They observe symmetry around us in many
(i) no line of symmetry forms. For example, trees reflected in crystal clear
(ii) infinite lines of symmetry water and the feathers of a Peocock and the wings
of butterflies and dragon flies have identical left and
(iii) four lines of symmetry right side. Pyramids of Egypt is one of the example
(iv) none of these of symmetry. If we stand with our backs to the mirror
and face an object that is in front of the mirror. Then
image of an object as seen in a mirror is its mirror
reflection or mirror image.