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Yes, the circle has parts! A circle may seem the same at all points but the quiz below will enlighten you on identifying the parts of a circle. It is a challenge worth a shot. Enjoy the discovery!
Questions and Answers
1.
Which of the following is a chord, but not a diameter?
A.
PR
B.
QR
C.
PT
Correct Answer C. PT
Explanation Line PR is the diameter and line QR is a radius. A radius is not a chord.
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2.
Which of the following is a radius?
A.
PQ
B.
QR
C.
QS
D.
All of the above
Correct Answer D. All of the above
Explanation In a circle, the radius is a line segment that connects the center of the circle to any point on the circle. In this question, PQ, QR, and QS are all line segments that connect the center of the circle to different points on the circle. Therefore, all of the given options (PQ, QR, QS) are examples of radii.
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3.
Name the center of this circle.
A.
Point P
B.
Point Q
C.
Point T
D.
Point R
Correct Answer B. Point Q
Explanation The center of a circle is the point that is equidistant from all points on the circumference of the circle. In this case, Point Q is the only point that is equidistant from all the given points P, T, and R. Therefore, Point Q is the center of the circle.
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4.
What is PR (or PQR)?
A.
Diameter
B.
Radius
C.
Chord
D.
Arc
Correct Answer A. Diameter
Explanation Diameter goes from one side of the circle to the other and always passes through the center.
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5.
If PQ is 3 cm long, then how long is PR?
A.
1.5 cm
B.
12 cm
C.
6 cm
D.
3 cm
Correct Answer C. 6 cm
Explanation Line PQ is the radius. The radius is half of the diameter. If you double the radius you will find the diameter.