Circle Vocabulary
The segment from the center of a circle to a point on the circle.
What is a radius?
A central angle measures 60°. What is the measure of its intercepted arc?
What is 60°?
Find the circumference of a circle with radius 5.
What is 10π?
Area of a circle with radius 3.
What is 9π?
A line that touches a circle at exactly one point is called this.
What is a tangent line?
A segment with both endpoints on the circle.
What is a chord?
A central angle intercepts an arc measuring 120°. What is the angle measure?
What is 120°?
Arc length of a 90° arc in a circle with radius 4.
What is 2π?
Area of a circle with diameter 10.
What is 25π?
A tangent line is always __________ to the radius at the point of tangency.
What is perpendicular?
A chord that passes through the center of the circle.
What is a diameter?
The measure of a semicircle.
What is 180°?
Arc length of a 180° arc in a circle with radius 6.
What is 6π?
Area of a 90° sector with radius 8.
What is 16π?
An inscribed angle intercepts an arc measuring 120°.
What is the measure of the inscribed angle?
What is 60°?
The distance around a circle.
What is circumference?
A type of arc that measures more than 180°.
What is a major arc?
Arc length of a 120° arc with radius 9.
What is 6π?
Area of a 180° sector with radius 10.
What is 50π?
An inscribed angle measures 35°.
What is the measure of its intercepted arc?
What is 70°?
An angle whose vertex is at the center of the circle.
What is a central angle?
The measure of the fourth arc in a circle if the other three arcs measure 60°, 120°, and 75°.
What is 105°?
Arc length of a 60° arc with radius 12.
What is 4π?
Area of a 60° sector with radius 12.
What is 24π?
A tangent and radius meet at the point of tangency. What is the angle formed?
What is 90°?