The set of all points in a plane which are equidistant from a fixed point is called?
A
Ellipse
B
Circle
C
Parabola
D
Line
Analysis & Theory
A circle is the locus of all points in a plane equidistant from a fixed point (the center).
The fixed point from which all points on a circle are equidistant is called?
A
Focus
B
Vertex
C
Center
D
Radius
Analysis & Theory
The center of a circle is the fixed point equidistant from all points on the circle.
The distance between the center and any point on the circle is called?
A
Diameter
B
Chord
C
Radius
D
Tangent
Analysis & Theory
The radius is the distance from the center to any point on the circle.
The longest chord of a circle is?
A
Radius
B
Diameter
C
Tangent
D
Secant
Analysis & Theory
The diameter passes through the center and is the longest chord of a circle.
A line which touches the circle at exactly one point is called?
A
Secant
B
Chord
C
Tangent
D
Radius
Analysis & Theory
A tangent touches the circle at exactly one point.
A line which intersects a circle at two distinct points is called?
A
Chord
B
Tangent
C
Secant
D
Diameter
Analysis & Theory
A secant intersects the circle at two points.
If the radius of a circle is r, then the diameter is?
A
r
B
2r
C
r/2
D
πr
Analysis & Theory
The diameter of a circle is twice its radius.
The formula for the circumference of a circle with radius r is?
A
πr²
B
2πr
C
πd/2
D
4πr
Analysis & Theory
Circumference = 2πr, where r is the radius.
The area of a circle with radius r is?
A
πr
B
2πr
C
πr²
D
4πr²
Analysis & Theory
Area of a circle = πr².
A chord that passes through the center of the circle is called?
A
Tangent
B
Radius
C
Diameter
D
Secant
Analysis & Theory
A diameter is a chord passing through the center of the circle.