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 7 - Mathematics
9.21 Perimeter of a Sector

Example:
The area of a sector whose radius is 8 cm is 120 sq cm. Find the perimeter of the sector.

Solution:
Given that,
A = 120 sq cm and r = 8 cm.
Formula A = lr/2
l = 2A/r
l = (2*120) / 8
Therefore, l = 30 cm.
Hence the perimeter of the sector = r + r + l
= 8 + 8 + 30
= 46 cm.


Directions: Read the above example carefully and answer the following questions. Also make 10 different examples of your own.
Q 1: The area of a sector whose radius is 8.4 cm is 83.16 sq cm. Find the perimeter of the sector.
26.6 cm
26 cm
36 cm
36.6 cm

Q 2: The area of a sector whose radius is 14 cm is 123.2 sq cm. Find the perimeter of the sector.
45 cm
45.6 cm
15 cm
17.6 cm

Q 3: The area of a sector is 288.75 sq cm. Find the radius if the perimeter of the sector is given by 69.5 cm.
27 cm
21 cm
19 cm
17 cm

Q 4: The radius of a sector is 16.8 cm. Find its area if the perimeter of the sector is given by 17.6 cm.
148.25 sq cm
186.61 sq cm
147.84 sq cm
187.13 sq cm

Question 5: This question is available to subscribers only!

Question 6: 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