Radius & Diameter
Circumference and Area
Tangent Segments
Arcs and Inscribed Angled
The equation of a circle
Vocabulary
100
The diameter is 10 inches. Find the radius.
What is 5 inches.
100
A circle has a diameter of 12.5 inches. What is the circumference?
What is
12.5pi
100
Is line segment AB tangent to circle C?
What is no?
9^2+15^2=18^2
306=324
100
Solve for the measure of arc QT.
What is 100 degrees?
100
What is the general equation of a circle?
What is
(x-h)^2+(y-k)^2=r^2
100
What is the segment that passes throught the center of the circle with endpoints on the circle?
What is a diameter?
200
The diameter is 25 feet. Find the radius.
What is 12.5 feet.
200
A circle has a radius of 12.5 inches. What is the circumference.
What is
25pi
200
AB and AD are Tangent to circle C. Solve for x.
What is 9.
200
Solve for the measure of angle RTS.
What is 24 degrees?
200
Write the equation of a circle with center (4,5) and radius 6.
What is
(x-4)^2+(y-5)^2=6^2
200
What is the distance around a circle called?
What is the circumference?
300
The circumference of the circle is
18 pi
Find the radius.
What is 9 inches
300
A circle has a radius of 50 miles. What is the area of the circle?
What is
2500pi
300
How would you set up the equation to verify that AB is tangent to circle C?
What is
40^2+48^2=60^2
300
Solve for the measure of arc GF.
What is
GF=130
300
Write the equation of a circle with the center (4,-5) and radius 3.78.
What is
(x-4)^2+(y+5)^2=3.78^2
300
What is the segment that intersects a circle at exactly 1 point?
What is a tangent?
400
The area of this circle is
25pi
Find the radius.
What is 5 inches.
400
A circle has a diameter of 16. Find the area in terms of pi.
What is
64 pi
400
AB and AD are tangent to circle C. Solve for x.
What is 3?
400
Solve for the measure of Z.
What is 100 degrees?
400
The center of a circle is (-1,3) and a point on the circle is (-5,6). Find the radius of the circle.
What is
r=5
400
What is the line that intersects a circle at 2 points?
What is a secant?
500
A circle has an area of
256pi cm2.
Find the diameter.
What is 32cm
500
A circle has a circumference of
6pi
What is the area?
What is
9 pi
500
AB is tangent to circle C. Solve for the value of r. Round to two decimal places.
What is 10?
500
Solve for the value of x.
What is
x=10
500
The end points of the diameter of a circle are (0,-1) and (-5,-6). Find the center of the circle.
What is
(-2.5,-3.5)
500
What is the name of the segment that has endpoints on the circle?
What is a chord?