Terminology
What is radius?
The distance from the center point to any endpoint on the circle
What is the area of a circle with a diameter of 22m?
380.13m2
Find circumference: When radius = 5
31.42 units
A bicycle tire has a radius of 14 inches. What is the circumference of the tire?
C = 87.92 in
If the radius is 30 the DIAMETER is?
60
What is diameter?
A straight line that passes through the center of a circle and divides the circle into two sections.
Find Area when Radius = 21m
1,385.44 m2
Find Circumference when Radius = 25
157.08 units
How is circumference similar to perimeter? And how is it different?
area around a shape.
pi is used for circles.
If the radius is 20cm what is the DIAMETER?
40cm
What is circumference?
The perimeter of a circle/ distance around.
A round table top has a diameter of 2.6 meters. What is its surface area?
A = 5.31 m2
What is the circumference of a circle with a diameter of 14?
43.98 units
A circular pond has a radius of 1.5m, what is the circumference of the pond?
9.4m
Find Circumference when Radius - 10
62.83 units
What does pi equal?
3.14
Find Area when Radius = 50cm
7,853.98 cm2
Find Circumference when Radius = 75
471.24 units
A Ferris-Wheel at an amusement park has a diameter of 40 feet. How far would you travel in one revolution?
C = 125.6 ft
What does Ms. Dosen always say about the formula?
UNITS ATTACHED
AND FULLY WRITTEN OUT.
What is the ratio of pi?
circumference divided by the diameter
Find Area when Radius = 35mm
3,848.45mm2
What is the circumference of a circle with a radius of 50km?
314.16km
The diameter of a circular park is 98 m. Find the cost of fencing it at $4 per meter.
$1232
How can the known variable of one side of a rectangle help determine the area of a circle in a compound shape?
Take the side and divide in half to get radius of circle.