Formulas
Area
Circles
Circumference
radians
100
What is the formula for the area of a circle?
r2 pi
100
if a circle has a radius of 12 what is the area?
144 pi
100
If a circle has a radius 14 what is the circumference?
28 pi
100
What is the circumference of a circle if the radius is 10?.
20 pi
100
What is the degree of a semi circle?
180
200
What is the formula for the area of a sector?
angle/360 r2 pi
200
If a circle has a radius of 2.6 what is the area of the circle?
6.76 pi
200
The area of the square is 196. What is the circumference of the circle rounded to the nearest tenth?
C=44.0
200
circumference is the full inside the circle or the outer rim?
Outer rim
200
60 degrees is how many radians?
Pi /3
300
What is the formula for circumfernece of a circle?
2 pi r
300
What si the area of the sector if the angle is 70 and the radius is 10?
19.44 pi
300
What is the difference between a tangent and a secant of a circle?
A tangent hits the outer edge and the secant goes through the circle.
300
What is the circumference of a circle with a diameter of 22?
22 pi
300
What degree is the angle if it is pi/4?
45 degrees
400
What is the formula for length of an arc of a circle?
angle/360 2 pi r
400
If the area of the sector is 30.25pi and the radius is 11 what is the angle?
90
400
What is the length of arc PQ? Round to the nearest tenth.
arc PQ = 9.4
400
What is the arc length of a circle with an angle of 22 and a radius of 21
1.28 pi
400
70 degrees is how many radians?
70/180 pi
500
What is the formula for pythagorean thereom?
a2 + b2 = c2
500
What is the area of a sector if the diameter is 32 and the ange is 135?
Calculate pi answer without pi
301.95
500
What is the length of the arc PQ (rounded to the nearest tenth)?
28.3
500
Solve for y and x.
y = 40 degrees
x=67
500
the angle subtended from the center of a circle which intercepts an arc equal in length to the radius of the circle.
A radian