NCERT Solutions Class 6 Mathematics Chapter 9 Symmetry

Symmetry

Question. A paper is folded into half 3 times as shown below. And a circle is then CUT OFF from the centre of the folded sheet. If the sheet is now opened out, how many circles will be seen on the sheet?

(a) 1
(b) 2
(c) 4
(d) 8

Answer : D

Question. How many lines of symmetry does this shape have?

(a) 0
(b) 1
(c) 2
(d) 4

Answer : B

Question. A line about which a figure is symmetrical is called a 'line of symmetry' for that figure. For instance, the dotted line shown below is a line of symmetry for the letter B. Which of the letters in the box given below has no line of symmetry?

(a) H
(b) M
(c) X
(d) Z

Answer : D

Question. For which of the following figures all lines of symmetry are NOT shown?

Answer : D

Question. How will the object above look when seen from direction X?

Answer : A

Question. Mala has a square sheet of paper which she folds along the lines shown. She then colours one part RED, one part BLUE and one part GREEN. She then cuts out the uncoloured part and folds it again in the above manner. Now she colours the 4 small parts red, blue, green and yellow respectively. What part of the whole sheet did she colour green?

(a) 1/8
(b) 1/4
(c) 5/16
(d) 1/2

Answer : C

Question. Each of the following figures has to be folded along a straight line in such a way that one part overlaps the other exactly. For which shape will this not be possible?

Answer : C

Question. The line m is a line of symmetry for square PQRS. (That means that the parts of the figure on either side of the line are mirror images of each other) 
What is the measure of PRS?

(a) 30^o
(b) 45^o
(c) 60^o
(d) 90^o

Answer : B

Question. A cake is cut into two equal parts by slicing it along the dotted line: How many faces and edges will EACH part have?

(a) 5 faces, 9 edges
(b) 3 faces, 6 edges
(c) 3 faces, 8 edges
(d) 5 faces, 8 edges

Answer : A