vocabulary
area/circumference
arc length
areas of sectors
conversion
100
How many degrees are in a circle?
360 degrees
100
What is the formula for area of a circle?
What is the formula for circumference of a circle?
A = (pi)r^2
C = 2(pi)r
100
What is the formula for arc length?
(m/360) * 2 * pi * r
100
What is the formula for area of a sector of a circle?
(m/360) * pi * r^2
100
When converting from radians to degrees what do you multiply radians by?
180/(pi)
200
How many degrees are in a semi-circle?
190 degrees
200
What is the area of a circle with radius = 1.5 m?
7.07 m^2
200
Set up the formula for arc length of a circle with diameter 21 inches and central angle 218 degrees?
(218/360) * 2 * pi * 10.5
200
Set up the formula for area of a sector of a circle with diameter 30 m and central angle 12 degrees?
(12/360) * pi * 15^2
200
Convert 3(pi)/ 2 to degrees
270 degrees
300
What is the relationship between diameter and radius of a circle?
The diameter is twice the radius
OR
The radius is half the diameter
300
What is the circumference of a circle with diameter 12 m?
37.70 m
300
what is the arc length of a circle with radius = 43 m and a central angle of 14 degrees?
10.51 m
300
What is the area of a sector of a circle with radius 9 cm and central angle 305 degrees?
215.59 cm^2
300
Convert 235 degrees to radians
4.10 radians
400
What are the two words you use for measurement of an angle in a circle?
Radians and Degrees
400
What is the circumference of a circle with diameter = 34 m?
106.81 m
400
what is the arc length of a circle with diameter = 39 m and a central angle of 100 degrees?
34.03 m
400
What is the area of a sector in a circle with diameter = 11 and central angle = 210 degrees?
55.44 m^2
400
What is the area of a sector of a circle with radius 7 cm and central angle of (pi)/2?
38.48 cm^2
500
What formula represents the green portion of the circle?
Area of a sector
500
If the area of a circle is 115 m^2 what is the radius of the circle?
6.05 m
500
If the arc length of a circle = 12 m and the circumference of that circle = 72 m what is the measure of the central angle in degrees?
60 degrees
500
The area of a circle is 55 m^2. The area of a sector in the circle is 13.75 m^2. What is the measure of the central angle in degrees?
90 degrees
500
Find the arc length of a circle with diameter 8 inches and central angle of (pi/3)
4.19 in