Construct a circle of radius:

(i) 2 cm

(ii) 3.5 cm

(i) Steps:

1. Mark a point O, as the centre of the circle.

2. Open the compass to the required radius of 2 cm by placing the pointer end at the zero mark of the ruler and the pencil end at the mark indicating 2 cm.

3. Place the pointer of the compass at O and hold it from the knob firmly.

4. Revolve (swing) the pencil end of the compass slowly to draw the circle.

Hence, the required circle of radius 2 cm with O as its centre is constructed.

(ii) Steps:

1. Mark a point O, as the centre of the circle.

2. Open the compass to the required radius of 3.5 cm by placing the pointer end at the zero mark of the ruler and the pencil end at the mark indicating 3.5 cm.

3. Place the pointer of the compass at O and hold it from the knob firmly.

4. Revolve (swing) the pencil end of the compass slowly to draw the circle.

Hence, the required circle of radius 3.5 cm with O as its centre is constructed.