Definition
What is a circle?
A round shape with no corners or line segments
Radius of 3cm
6cm
Diameter of 5cm
2.5cm
The diameter of a nickel is 2 cm. What is the circumference?
6.28 cm
What is a radius?
a straight line from the center to the circumference of a circle
Radius of 12m
Diameter of 32m
16m
The circumference of a circle is 15.7 centimeters. What is the diameter?
5cm
What is a diameter?
a straight line passing from side to side through the center of a circle
Radius of 219mm
438mm
Diameter of 1412cm
706cm
The distance around the wheel of a truck is 9.42 feet. What is the diameter of the wheel?
What is a circumference?
Complete this equation:
C=_d
C=𝝅d
Complete this equation:
C=_ _ r
C=2𝝅r
The diameter of your bicycle wheel is 25 inches. How far will you move in one turn of your wheel?
78.5in
𝝅 is an example of what number?
Irrational number
Circumference is 7cm. (Round to one decimal place for the answer)
2.2cm
Circumference is 29cm. (Round to one decimal place for the answer).
9.2cm
An asteroid hit the earth and created a huge round crater. Scientists measured the distance around the crater as 78.5 mi. What is the diameter of the crater?
25 mi