Chapter C2- circles

Question 1

What is the formular for calculating the circumference of a circle?

Answer 1

two times Pi times radius

Question 2

What is the formular for calculating the area of a circle?

Answer 2

Pi times radius squared

Question 3

What does Chord mean?

Answer 3

a line segmenton the interior of a circle with both its endpoints lying on the circle

Question 4

What does diameter mean?

Answer 4

a line segment that passes through the centre of a circle with both its end points lying on the circle

Question 5

What does centre mean?

Answer 5

The point inside the circle, from which all points on the circle are the same distance

Question 6

What does Radius mean?

Answer 6

a line segment joining the centre of a circle with any point on the circle

Question 7

What does sector mean?

Answer 7

a piece of a circle bounded by two radii and an arc is a sector

Question 8

What does sectant mean?

Answer 8

a line that cuts across a circle at two points

Question 9

What does segment mean?

Answer 9

a section of a circle between a chord and an arc

Question 10

What does semi-circle mean?

Answer 10

half of a circle, the area enclosed by a diameter and an arc of the circle joining its two ends

Question 11

What does mid-point mean?

Answer 11

the point on a line segment that is halfway between the end points of the line segment