Q.1.
What does the following formula tell us about a circle? Πr
Q.2.
What do we call a line which joins two points on the edge of a circle but does not pass through its centre?
Q.3.
What is the value of π to four decimal places?
Q.4.
We use a Greek letter π to help us work formulae for circles. What is its name?
Q.5.
What is the name of a shape that forms half a circle?
Q.6.
What is the formula to calculate the circumference of a circle?