Q101 of 124 Page 364

Construct an equilateral triangle ABC of side 6 cm.

The steps are as follows:

1. Draw a line AB of side 6 cm

2. From B draw an arc with a radius of 6 cm.

3. From A draw an arc with a radius of 6 cm.

4. The point where the two arc intersects is the third point of triangle, C.

5. Join AC to complete the triangle.

Draw a triangle whose sides are of lengths 4 cm, 5 cm and 7 cm.

100

Construct an obtuse angled triangle which has a base of 5.5 cm and base angles of 30° and 120°.

102

By what minimum angle does a regular hexagon rotate so as to coincide with its original position for the first time?

103

In each of the following figures, write the number of lines of symmetry and order of rotational symmetry.

[Hint: Consider these as 2-D figures not as 3-D objects.]