Perimeter Of A Circle -Multiple Choice Questions Quiz

Question 1: What is the formula to calculate the circumference (C) of a circle with radius (r)?

(a) C = π × r
(b) C = 2π × r
(c) C = π × r^2
(d) C = 2 × r^2

Question 2: The circumference of a circle is directly proportional to its:

(a) Area
(b) Diameter
(c) Radius squared
(d) Perimeter

Question 3: A circle has a diameter of 10 units. What is its circumference?

(a) 10π units
(b) 20π units
(c) 5π units
(d) 100 units

Question 4: If the circumference of a circle is 36π units, what is its radius?

(a) 6 units
(b) 9 units
(c) 12 units
(d) 18 units

Question 5: What is the circumference of a circle with a radius of 7 centimeters (rounded to the nearest tenth)?

(a) 44 centimeters
(b) 14 centimeters
(c) 22 centimeters
(d) 15.7 centimeters

Question 6: If the circumference of a circle is 30 units, what is its diameter?

(a) 5 units
(b) 100 units
(c) 15π units
(d) 30/π units

Question 7: The circumference of a circle is 66π centimeters. What is its diameter?

(a) 11 centimeters
(b) 33 centimeters
(c) 22 centimeters
(d) 66 centimeters

Question 8: The circumference of a circle is tripled. By what factor does its radius change?

(a) Tripled
(b) Doubled
(c) Quadrupled
(d) Halved

Question 9: If the circumference of a circle is 62.8 units, what is its radius?

(a) 10 units
(b) 5 units
(c) 20 units
(d) 31.4 units

Question 10: What is the circumference of a circle whose diameter is 18 inches?

(a) 9π inches
(b) 18π inches
(c) 36π inches
(d) 27π inches

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Results:

Total score: /10

Answer key:

Question 1: b

Question 2: b

Question 3: a

Question 4: d

Question 5: a

Question 6: d

Question 7: d

Question 8: a

Question 9: a

Question 10: b