Question

draw a circle of radius 4.2 cm with the centre at o. mark three points a,bc, such that point a is on the circle, b is in the interior ,and c is in the exterior of the circle.

Answer 1

1 - Take the radius of your compass as 4.2 cm

2 - mark the centre as O

3 - mark 3 points, 1st on the circle, 2nd inside the circle and the 3rd outside the circle