Year 8
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Lesson details
Key learning points
- In this lesson, we will calculate the perimeter of shapes involving fractions of circles.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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6 Questions
Q1.
If the diameter of a circle is 20. What is the circumference?
10 pi
100 pi
Q2.
If the circumference of a circle is 14 pi. What is the radius?
14
28
Q3.
What is the arc length for a?
15.7
1800
5 pi
Q4.
What is the arc length for b?
20
20 pi
5
Q5.
What is the arc length for c?
15
7.5
Q6.
What is the arc length for d?
2
4
5 Questions
Q1.
Pi is approximately...
1.41
2.71
4.59
Q2.
If a circle has radius 5, then the circumference is approximately...
15.7
16.2
27.1
Q3.
Find the perimeter of a.
15+2.5pi
15+5pi
20+5pi
Q4.
Find the perimeter of b.
36+20pi
36+5pi
56 + 20pi
56+10pi
Q5.
Find the perimeter of c.
36pi + 48
72pi + 24
72pi + 48