Circumference of a circle

Lesson details

Key learning points

1. In this lesson, we will learn about the relationship between the circumference and the diameter.

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5 Questions

Q1.
What is the name of the green area?
Chord
Sector
Q2.
What is the length of the diameter?
5cm
7cm
Q3.
What is the length of the radius?
10cm
12.5cm
25cm
Q4.
A _________ is a straight line outside a circle that touches one point of the circumference.
Arc
Chord
Q5.
An __________ is part of the circumference of the circle
Chord
Tangent

5 Questions

Q1.
Approximately how many times bigger is a circumference than a diameter?
1.59
3.41
4.15
Q2.
What is the circumference of this circle?
16 pi
4 pi
Q3.
What is the circumference of this circle?
16 pi
4 pi
Q4.
What is the value of the missing length if the circumference is 81 pi.
254
40.5