Circle Vocabulary
Tangent Lines
Segments in a Circle
Circumference
Coordinate Plane
100
The line that cuts a circle exactly in half.
Diameter
100
How many times does a tangent line hit a circle?
Once
100
Solve for x:
x = 7
100
The circumference is the ___________ of a circle.
perimeter
100
In the equation (x - h)2 + (y - k)2 = r2, what does (h, k) represent?
The center of the circle
200
The line that is half the distance of the diameter
radius
200
A tangent line is __________ to the radius drawn to the point of tangency
perpendicular
200
The age of baby Yoda.
What is 50 years old?
200
What is the formula to find the circumference of a circle?
C = pi*d or C = pi*2r
200
What is the diameter of the circle?
(x - 3)2 + (y + 3)2 = 9
diameter = 6
300
A piece of the circumference
arc
300
What shape is created from two tangent lines to one circle that start at the same point?
Kite
300
If PC = x2 and QC = 9, find x.
x = 3
300
What are the first three digits of pi?
3.14
300
Write an equation for a circle with radius = 9 and center at (2, 0).
(x - 2)2 + y2 = 81
400
A portion of the area of a circle.
sector
400
Two tangent lines drawn from the same point outside the circle are _______________.
Congruent/same length
400
True or False: If angle A = 90o, then AB is a tangent line.
True
400
What is the circumference of a circle with a radius of 10 yards? Leave pi in your answer.
10*pi yards
400
What are the coordinates of the center of the circle whose equation is:
(x - 4)2 + (y + 1)2 = 6
(4, -1)
500
A line that crosses a circle twice.
secant
500
Solve for the radius, x.
x = 8
500
If BD = BC, what kind of triangle is DBC?
equilateral triangle
500
What is the radius of a circle with a circumference of 10*pi yards?
radius = 5 yards
500
Which quadrant is this circle located in?
Quadrant 3