Page 242 - Start Up Mathematics_6

MATHS LAB ACTIVITY

Objective: To make symmetrical figures

Material required: Sheets of paper, ink of different colours, strings of thread

Ink-blot Devils

Step 1: Take a sheet of paper. Fold it in half.
Step 2: Spill drops of ink of different colours or paint on one
half of the folded paper. Cover it with the other half.
Step 3: Now press both the halves together on a flat surface
for some time before opening it.
Step 4: The figure so formed will be a symmetrical figure.

Step 5: The line of folding is the axis or line of symmetry.

Inked String Patterns

Step 1: Take a sheet of paper. Fold it in half.
Step 2: Dip some pieces of strings in different coloured ink or paint.
Step 3: Spread the strings on one half of the folded paper. Cover it with the other half.

Step 4: Now press both the halves together on a flat surface for some time before opening it.
Step 5: The figure so formed will be a symmetrical figure having string patterns.
Step 6: The line of folding is the axis or line of symmetry.

Example 1: List any four symmetrical objects.
Solution: LCD TV, the front of a school bus, blackboard and window
Example 2: For the given figure, which one is the mirror line, l or l ? l 1
1 2
Solution: Since the figure is symmetrical about l , therefore it is the
2
mirror line.
Example 3: Check whether the given figures are symmetrical or not. l
In case they are symmetrical, draw the line(s) of symmetry. 2

(a) (b) (c)

(d) (e) (f)

Solution: Figures (a), (b), (d) and (f) are symmetrical, while figures (c) and (e) are not
symmetrical.

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