Page 253 - Ganit Kaushal

Ex 11. Copy the following on a dot grid. For each figure, draw two more lines to make a shape that has a line
of symmetry. (NCERT)

Sol. The shapes are shown below. Two more lines drawn are shown in red, and the line of symmetry is
shown by dotted black lines.

Ex 12. Copy the following drawings on squared paper. Complete each one of them so that the resulting figure
has the two blue lines as lines of symmetry. (NCERT)

(a) (b) (c)

Sol. The shapes are shown below. In each shape, the two blue lines are lines of symmetry.

(a) (b) (c)

Ex 13. Write the number of lines of symmetry in each letter of the word “ SYMMETRY ”.

,
Sol. , have no line of symmetry, whereas E Y T M have only 1 line of symmetry.
,
,
Exercise 9.1

1. Trace each figure and draw the lines of symmetry, if any: (NCERT)

(a) (b) (c) (d)

Symmetry 251