kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
3.31 Area of a Circle - 2

Example:
The circumference of a circle is 56.6 cm. Find its area.

Solution:
If r is the radius of a circle, we have
Circumference (C) = 2pr
Therefore, the area of the circle = p r2
A = p(C/2p)2
A = C2 / 4p
Given that,
C = 56.5cm.
A = (56.5)2/4 * 7/22
A = 22345.75/ 88
A = 253.93 Sq. cm.
Therefore, the area of he circle (A) = 253.93 Sq. cm. (Answer is corrected by two decimal place)


Directions: Solve the following problems and correct the answer two decimal places. Also write at least ten examples of your own.
Q 1: The circumference of a circle is 36.5 cm. Find its area.
106.97 Sq.cm.
105.97 Sq.cm.
107.97 Sq.cm.
104.97 Sq.cm.

Q 2: The circumference of a circle is 58.6 cm. Find its area.
274.16 Sq.cm.
271.16 Sq.cm.
272.16 Sq.cm.
273.16 Sq.cm.

Q 3: The circumference of a circle is 19.5 cm. Find its area.
31.25 Sq.cm.
30.25 Sq.cm.
29.25 Sq.cm.
28.25 Sq.cm.

Q 4: The circumference of a circle is 64.7 cm. Find its area.
332.98 Sq.cm.
None of these
333.98 Sq.cm.
331.98 Sq.cm.

Q 5: The circumference of a circle is 49.7 cm. Find its area.
196.48 Sq.cm.
195.48 Sq.cm.
194.48 Sq.cm.
197.48 Sq.cm.

Q 6: The circumference of a circle is 96.4 cm. Find its area.
738.21 Sq.cm.
740.21 Sq.cm.
737.21 Sq.cm.
739.21 Sq.cm.

Q 7: The circumference of a circle is 78.4 cm. Find its area.
486.93 Sq.cm.
489.93 Sq.cm.
488.93 Sq.cm.
487.93 Sq.cm.

Q 8: The circumference of a circle is 81.9 cm. Find its area.
532.56 Sq.cm.
533.56 Sq.cm.
534.56 Sq.cm.
531.56 Sq.cm.

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


Subscription to kwizNET Learning System offers the following benefits:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • Choice of Math, English, Science, & Social Studies Curriculums
  • Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
  • Get discount offers by sending an email to discounts@kwiznet.com

Quiz Timer