Circle Parts Quiz
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Questions and Answers

What defines a chord in a circle?

  • A part of the circumference limited by two points.
  • A line segment that connects the center to any point on the circumference.
  • A line segment that passes through the center with endpoints on the circumference.
  • A line segment joining any two points on the circumference. (correct)

    • Which of the following correctly describes a segment of a circle?

  • It is the area within the circle bounded by a chord and an arc. (correct)
  • It consists of two endpoints on the circumference with a straight line connecting them.
  • It is formed by two radii and the intercepted arc.
  • It refers to half of the circle.

    • What is the relationship between a radius and a diameter?

  • The radius is twice the length of the diameter.
  • The radius connects the center to the circumference, while the diameter connects two points on the circumference through the center. (correct)
  • The radius can be considered as half of the diameter. (correct)
  • The diameter is equal to the radius.

    • What is the definition of a diameter in a circle?

    <p>A line segment passing through the center connecting two points on the circle.</p> Signup and view all the answers

    What does a central angle in a circle have its vertex?

    <p>At the center of the circle.</p> Signup and view all the answers

    How is the semi-circumference of a circle calculated?

    <p>Taking half of the total circumference.</p> Signup and view all the answers

    Which of the following best defines a sector of a circle?

    <p>The region bounded by two radii and an arc.</p> Signup and view all the answers

    Identify the correct characteristic of a minor arc.

    <p>An arc whose degree measure is less than 180°.</p> Signup and view all the answers

    What distinguishes an inscribed angle from a central angle?

    <p>An inscribed angle has its vertex on the circle with its sides as chords.</p> Signup and view all the answers

    Which term describes the total distance around a circle?

    <p>Circumference</p> Signup and view all the answers

    What is the measurement of an obtuse angle?

    <p>Greater than 90° but less than 180°</p> Signup and view all the answers

    Which of the following angles represents a straight angle?

    <p>180°</p> Signup and view all the answers

    What do complementary angles sum to?

    <p>90°</p> Signup and view all the answers

    Which angle type is greater than a straight angle?

    <p>Reflex Angle</p> Signup and view all the answers

    Which of the following is an example of a whole angle?

    <p>360°</p> Signup and view all the answers

    What is the measure of an acute angle?

    <p>More than 0° but less than 90°</p> Signup and view all the answers

    Which statement accurately describes a right angle?

    <p>It measures exactly 90°</p> Signup and view all the answers

    Which of the following correctly defines an angle?

    <p>An angle formed by two rays joined at a common point called the vertex</p> Signup and view all the answers

    What is the basic unit for measuring angles?

    <p>Degrees</p> Signup and view all the answers

    If an angle measures 55°, what type of angle is it classified as?

    <p>Acute angle</p> Signup and view all the answers

    What is the complement of an angle measuring 38°?

    <p>52°</p> Signup and view all the answers

    What is the complement of an angle measuring 38°?

    <p>52°</p> Signup and view all the answers

    If two angles are supplementary, what is the total measure of the angles combined?

    <p>180°</p> Signup and view all the answers

    Find the supplement of an angle measuring 67°.

    <p>113°</p> Signup and view all the answers

    If two angles are supplementary and one measures 50°, what is the measure of the other angle?

    <p>130°</p> Signup and view all the answers

    What is the complement of an angle whose measure is 67°?

    <p>23°</p> Signup and view all the answers

    What is the supplement of an angle measuring 123°?

    <p>57°</p> Signup and view all the answers

    Which of the following angles is NOT supplementary to 67°?

    <p>90°</p> Signup and view all the answers

    Which of the following pairs of angles are supplementary?

    <p>All of the above</p> Signup and view all the answers

    If the measure of an angle is 67°, what is its complement?

    <p>23°</p> Signup and view all the answers

    Study Notes

    Circle Parts

    • Center: The fixed point within the circle from which all points of the closed curve are equidistant.
    • Circumference: The distance around a circle.
    • Semi-circumference: Half of the circumference.
    • Arc: A part of the circumference limited by two points.
    • Radius: A line segment joining the center to any point on the circumference.
    • Diameter: A line segment that passes through the center and has endpoints on the circumference.
    • Chord: A line segment joining any two points on the circumference.
    • Surface: A part of a plane within the outline of the circle.
    • Sector: The part of a plane formed by two radii and its intercepted arc.
    • Segment: A part of a plane formed by a chord and an arc.
    • Semi-circle: Half of a circle.
    • Central angle: An angle with its vertex at the center of a circle and is made up of two radii of the circle.
    • Inscribed angle: An angle with its vertex on the circle and is made up of two chords of the circle.

    Circle Symbols

    • Y: Center
    • YN: Radius
    • YD, YC: Radii
    • CN: Diameter
    • CA: Chord
    • CN + NC: Circumference
    • YD + YN + DN: Sector
    • CA + CA: Segment
    • CN + CN: Semi-circle
    • ∠CYD and ∠DYN: Central Angle
    • CN: Semi-circumference
    • ∠NCA: Inscribed Angle

    Arcs

    • Minor Arc: An arc of a circle whose degree measure is less than 180°.
    • Major Arc: An arc of a circle whose degree measure is greater than 180°.

    Angle Types & Definitions

    • Acute Angle: An angle which is less than a right angle. Measures between 0° and 90°.
    • Right Angle: An angle which measures exactly 90°.
    • Obtuse Angle: An angle that is greater than a right angle (90°) but less than a straight angle (180°).
    • Straight Angle: An angle that measures exactly 180°.
    • Reflex Angle: An angle that is greater than a straight angle (180°) but less than a whole angle (360°).
    • Whole Angle: An angle that measures exactly 360°.

    Complementary & Supplementary Angles

    • Complementary Angles: Two angles whose sum of measures is 90°.
    • Supplementary Angles: Two angles whose sum of measures is 180°.

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    Description

    Test your knowledge on the different parts of a circle with this quiz. From the central angle to the diameter, each question will challenge your understanding of these key concepts. Perfect for students studying geometry!

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