Column One
A line joining the center with any point on the circle is called ______
radius
What type of arc is greater than a semicircle?
major arc
What type of arc is less than a semicircle?
minor arc
True or False: All radii in a given circle are equal.
true
The length of a hypotenuse of a right triangle is 30. Find the median to the hypotenuse.
15
The arc which represents half a circle is called a _____
semicircle
What type of angle is formed by two radii?
central angle
A line through the center of a circle with its endpoints on the circle is called the ______.
diameter
A straight line through any point within a circle cuts the circle at how many points?
2
The vertex angle of an isosceles triangle is 68. Find an exterior angle at the base.
124
The perimeter of a circle is called the _______
circumference
Any straight line whose ends are on the circle is called a _______
chord
What is the greatest chord in any circle?
diameter
The arc which represents a quarter of a circle is called a _______
quadrant
One of two complementary angles is 40 less than 3 times the other. Find the two angles.
55 and 125
A diameter of a circle cuts the circle into how many semicircles?
two
they are equal
If two chords in a circle are equal are they parallel to each other?
maybe (sometimes)
If two chords bisect each other what can we conclude about each of the chords?
they are diameters
The base angles of an isosceles triangle are 20 degrees more than twice the vertex angle. Find the vertex angle.
28
How do you determine whether a point is within a circle, on a circle or outside of a circle?
compare it's distance from center to length of radius
To prove that two circles are congruent what must be done?
equal radii or diameters
To prove that two congruent circles coincide what must be done?
centers must coincide
To prove that two arcs of a circle are equal what must be done?
The median of a trapezoid is 20 inches and one base is 8 more than the other base. Find both bases.
16 and 24