A line that goes from one side of a circle to the other side of a circle.
What is a Chord?
100
The angle formed by joining the endpoints of an arc to the center of the circle.
What is a central angle?
100
The number of tangents to a circle you can possibly draw from a single point outside the circle.
What is two?
200
The arc that subtends the diameter of a circle.
What is a semicircle?
200
The point where a tangent touches a circle.
What is a Point of Tangency?
200
The radius does this to a chord when they are perpendicular.
What is bisect?
200
The angle formed by joining the endpoints of an arc to a point on the circle.
What is an Inscribed Angle?
200
Water is flowing through a pipe with radius 14 cm. The maximum depth of the water is 9 cm. This is the width of the surface of the water.
What is 26.2 cm?
300
A straight line that goes from one side of the circle to the other side of the circle through the center.
What is a Diameter?
300
A tangent and a radius of a circle make a ninety degree angle at the point of tangency.
What is the Tangent-Radius Property?
300
The size of the angle between a radius and a chord, when the chord is bisected.
What is ninety degrees?
300
These types of angles are equal when subtended by the same arc.
What are Inscribed Angles?
300
A rectangle is inscribed in a circle with radius 7 cm. The length of the rectangle is 12 cm. This is the width of the rectangle.
What is 7.2 cm?
400
A tool used for measuring angles.
What is a protractor?
400
Four tangents to a circle make this figure when they are ninety degrees to teach other.
What is a square?
400
A chord that is ninety degrees to a tangent is also known as this.
What is a diameter?
400
This angle is twice the inscribed angle when subtended by the same arc.
What is a Central Angle?
400
A spherical fish bowl has diameter 26 cm. The surface of the water in the bowl is a circle with diameter 20 cm. The maximum depth of the water is this.
What is 21.3 cm (or 4.7 cm)?
500
A tool used for drawing circles.
What is a compass?
500
In a triangle, the line that connects the tangent and the radius of a circle.
What is a hypotenuse?
500
If you were to draw two different chords and bisect them, the two bisectors would intersect at this point.
What is the center (origin) of the circle?
500
All inscribed angles subtended by a semicircle are this.
What are Right Angles?
500
A dream catcher with diameter 22 cm is strung with a web of straight chords. One of these chords is 18 cm long. This is the distance from the center of the circle to the chord.