ML AGGARWAL CLASS 8 Chapter 16 Symmetry Reflection and Rotation Excercise 16.1

 Excercise 16.1

Question 1

(i) One 

(daigram should be added)

(ii) One 

(daigram should be added)

(iii) Zero 

(iv) Four

(daigram should be added)

(v) Three

(daigram should be added)

(vi) Four

(daigram should be added)

Question 2

(i) zero

(daigram should be added)

(ii) zero

(daigram should be added)

(iii) Two

(daigram should be added)

(iv) Four

(daigram should be added)

(v) Three

(daigram should be added)

(vi) Four

(daigram should be added)

Question 3

Given 

$A B=5.3 \mathrm{Cm}$

$B C=3 \mathrm{Cm}$

1. Draw straight line $A B=5.3 \mathrm{Cm}$

2.Draw 90' line to AB at point B

3. Cut at a distance BC = 3cm and note the point 'C'

4.Now drew 5.3cm are from C and 3cm arc from A , Intersection point is D.

5. Join CD and AD. Then ABCD is a required rectangle

$\Rightarrow$ Two symmetry lines

(daigram should be added)

Question 4

Given

$A B=5.3 \mathrm{~cm}$

$\angle A=60^{\circ}$

1.Draw AB = 5.3cm

2.At A, contstruct $\angle B A P=60^{\circ}$

3.From AP, Cut off AD = 5.3cm, draw aware.

4.With D as centre and radius 5.3cm , draw aware to meet the previous arc at C

5.Join BC and CD. Then ABCD is the required rhombus.

(daigram should be added)