question_answer

Open your geometry box. There are some drawing tools. Observe them and complete the following table:

Name of the tool	Number of lines of symmetry
(i) Ruler	..........................
(ii) Divider	..........................
(iii) Compasses	..........................
(iv) Protractor	..........................
(v) Triangular piece with two equal sides	..........................
(vi) Triangular piece with unequal sides	..........................

 

Answer:

By observing the geometry tools we find some important results.

(i) In the ruler we can draw both horizontal and vertical lines. Hence in the ruler number of lines of symmetry is 2.

(ii) In the divider we can draw only one line of segment for dividing. So in the divider number of lines symmetry is 1.

(iii) In the compass we can-not draw any line of segment for dividing in each part. So in the compass number of lines of symmetry is 0.

(iv) In the protractor we can draw only one line of segment for dividing in each part. So in the protractor number of lines of symmetry is 1.

(v) In the triangular piece with two equal sides we can draw only one line of segment because there are two equal sides of triangle. Hence the line of symmetry is 1.

(vi) In the triangular piece with unequal sides we can?t draw any line of segment because there is no equal sides of triangle. Hence the line of symmetry is 0.

Name of the tool	Number of lines of symmetry
(i) Ruler	2
(ii) Divider	1
(iii) Compasses	0
(iv) Protractor	1
(v) Triangular piece with two equal sides	1
(vi)Triangular piece with unequal sides	0