Circles Vocab
Area
Circumference
Inscribed Angles
Tangent Lines
100
What vocabulary word best describes
overline (AB)
Radius
100
What is the general equation for the area of a circle?
A = pir^2
100
What is the general equation for the circumference of a circle?
C = 2pir
100
Fill in the blank!
Inscribed angles are _____ the intercepted arc!
Half
100
Name the tangent line below!
leftrightarrow IJ
200
How many chords are in the image below?
Three!
200
Calculate the area of the circle below. Round your answer to the nearest hundredth.
248.85 cm2
200
Find the circumference of the circle below. Round to the nearest tenth.
27.0 ft
200
Find the measure of the arc below.
168 degrees
200
Fill in the blank!
Tangent lines are always __________ to the radius/diameter!
perpendicular
300
Name the secant line below!
leftrightarrow GH
300
The diameter of a circle is 14 cm. What is the area of the semicircle?
307.88 cm2
300
The diameter of a circle of 20 km. What is the arc length of the quarter-circle?
15.71 km
300
Find the measure of the angle indicated below.
68 degrees
300
Determine if line AB is tangent to the circle
Yes, it is tangent!
400
Name three major arcs! (Use proper notation)
Answers will vary :)
400
The area of a circle is 250 ft2 and a central angle of 135o. Find the area of the sector. Round to the nearest hundredths.
93.75 ft2
400
Find the arc length of the major arc below. Round to the nearest tenth.
66.0
(it's the MAJOR ARC, not the minor arc silly!)
400
Solve for x.
x = 11
400
Line AB is tangent to circle O. If manglePOD=32^o What is manglePCD ?
58o
500
Points A, B, and C are three points on the circle with three lines connecting the points to each other. The line containing points B and C goes through the center of the circle. What vocabulary word best describes
angleCAB
Inscribed Angle!
500
A sector has a central angle of frac{3pi}{10} radians and a radius of 5 inches. What is the area of the sector? Round to the nearest hundredth.
11.78 inches.
500
The arc length of arc AB is 4Ď€ ft and the radius is 6. What is the central angle in degrees?
120o
500
Solve for x.
x = 3
500
Solve for x! (Assume that those two lines are tangent)
x = 10