Area and Circumference (perimeter) of a Circle Flashcards
1
Q
What is the equation to find the area of a circle?
A
2
Q
What is the equation to find the circumference (perimeter) of a circle?
A
2πr , πd
3
Q
Work out the circumference of the circle. Give your answer to 3 significant figures.
r = 3.6
A
22.6cm^2
4
Q
Work out the circumference of the circle. Give your answer to 2 decimal places.
D = 9
A
22.87cm^2
5
Q
Work out the area of the circle. Give your answer to 3 significant figures.
r = 2.4
A
18.1cm^2
6
Q
Work out the area of the circle. Give your answer to two decimal places.
D = 6
A
28.27cm^2
7
Q
How can we calculate the diameter?
A
By adding multiplying the radius by two we can find the diameter.
