Advertisements
Advertisements
प्रश्न
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) The Ruler | ______ |
| (ii) The Divider | ______ |
| (iii) The Compasses | ______ |
| (iv) The Protactor | ______ |
| (v) Triangular piece with two equal sides | ______ |
| (vi) Triangular piece with unequal sides | ______ |
उत्तर
| Name of the tool | Number of lines of symmetry |
| (i) The Ruler | Two |
| (ii) The Divider | One |
| (iii) The Compasses | Zero |
| (iv) The Protactor | One |
| (v) Triangular piece with two equal sides | One |
| (vi) Triangular piece with unequal sides | Zero |
Explanation:
(i) Ruler
It has two lines of symmetry.
(ii) Divider
It has one line of symmetry.
(iii) Compass
Since, both the sides of a compass are not identical. Therefore, it has no line of symmetry.
(iv) Protractor
Since, a protactor has a shape of semi-circle and a semi-circle has only one line of symmetry.
(v) Triangular piece with two equal sides
It has one line of symmetry.
(vi) Triangular piece with unequal sides
APPEARS IN
संबंधित प्रश्न
Given below are part of a geometrical figure. Complete the figure so that both axes are lines of symmetry.
Draw an equilateral triangle each of whose sides is 4 cm. Draw all its lines of symmetry.
Construct a ΔABC, in which AB = AC = 3 cm and BC = 2cm. Using a ruler and compasses only, draw the reflection of A’BC of ΔABC, in BC. Draw the lines of symmetry in the figure ABA’C.
Draw a line of symmetry of the given figure such that one hole coincide with the other hole(s) to make pairs.
A 30° – 60° – 90° set-square has ______ line/lines of symmetry.
A regular octagon has 10 lines of symmetry.
In figure, PQRS is a rectangle. State the lines of symmetry of the rectangle.
Find the number of lines of symmetry for the following shape:
On a squared paper, sketch the following:
A quadrilateral with both horizontal and vertical lines of symmetry.
Trace the figure and draw the lines of symmetry, if any:
