1. What is the radius of a circle whose diameter is 6cm? *
A. 3 cm
B. 3.5 cm
C. 6 cm
D. 12 cm
2. A circle's diameter is 10 cm. What is its radius? *
A. 2.5 cm
B. 5 cm
C. 10 cm
D. 20 cm
3. The side length of a square paper is 40 cm. What is the diameter of the largest circle that can be drawn on the paper? *
A. 5 cm
B. 10 cm
C. 20 cm
D. 40 cm
4. Which of the following instrument used to draw a circle? *
A. compass
B. protractor
C. ruler
D. straight edge
5. How many degrees are there when a compass makes a full circle? *
A. 45 degrees
B. 90 degrees
C. 180 degrees
D. 360 degrees
6. In drawing a circle, what instrument can be used to ensure that its diameter is 10 cm? *
A. compass
B. protractor
C. ruler
D. straight edge
7. What part of a circle is twice as long as a radius? *
A. chord
B. circumference
C. diameter
D. secant
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