Equations
Vocab
Circumference
Area
Circles Extended
100
R = D/2
What is Radius
100
The point in the middle of a circle is called this
What is center
100
A circle with a diameter of 2 m has a circumference of
What is 6.28m
100
When you "square" a number you do this
What is multiply by itself
100

Consider the following statement. If the radius of a circle is doubled the area is always doubled.

never true

200
D=R * 2
What is Diameter
200
A line that goes halfway through a circle is called this
What is Radius
200
A circle with a radius of 5 inches has a circumference of
What is 31.4 inches
200
A circle with a radius of 3cm has an area of
What is 28.26cm^2
200

Ashley sits on a carousel horse that is 4.8 m from the center of the carousel. How far does she travels in 1 rotation?

30.14

300
C = 2πr
What is Circumference with a radius
300
The perimeter around a circle is called
What is circumference
300
A circle that has a radius of 6cm has a circumference of
What is 37.68 cm
300
A circle with a radius of 12m has an area of
What is 452.16 m ^ 2
300

Suki is walking on a circular path around a park. The diameter of the circle is 3 km. What is the distance that she walks? Answer to the nearest kilometer.

9 km

400
C = πd
What is Circumference with a diameter
400
The inside of a circle, calculated using an equation
What is Area of a circle
400
A circle with a diameter of 22m has a circumference of
What is 69.08m
400
A circle with a diameter of 14in has an area of
What is 153.86in^2
400

The perimeter of a circle with a radius of 6 m is

What is 30.84 m

500
A = πr^2
What is Area of a circle
500
The outside lengths/sides of a shaped added together
What is Perimeter
500
A circle with a radius of 13in has a circumference of
What is 81.64in
500
A circle with a diameter of 18cm has an area of
What is 254.34cm ^ 2
500

A semi circle with a radius of 8 m has a perimeter of

What is 41.12 m

M
e
n
u