Parts of a Circle Worksheet
Identify and define the key parts of a circle, including radius, diameter, chord, secant, tangent, arc, and sector.
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Parts of a Circle
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Read each question carefully and provide the best answer. Refer to the diagram of the circle for questions that require it.
1. A is a line segment that connects the center of a circle to any point on its circumference.
2. A is a line segment that connects two points on the circumference of a circle and passes through the center.
3. A is a line that intersects a circle at exactly one point.
4. A is a portion of the circumference of a circle.
5. Which of the following is an example of a chord that is NOT a diameter?
A line segment from the center to the edge.
A line segment connecting two points on the circle, not through the center.
A line that passes through the circle at two points and extends infinitely.
A line that touches the circle at exactly one point.
6. If the radius of a circle is 7 cm, what is its diameter?
3.5 cm
7 cm
14 cm
21 cm
7. Define a secant of a circle. How is it different from a tangent?
8. Explain the relationship between the radius and the diameter of a circle.
9. All chords of a circle are also diameters.
True
False
10. A tangent line touches the circle at exactly two points.
True
False