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 (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Grade 7 - Mathematics9.20 Angle of a Sector

 Example: Find the angle of a sector of a circle whose area is 1/4th of the circle. Solution: Area of a circle = pr2. Area of a sector is = q/360opr2. Here (1/4)pr2 = (q/360o)pr2. i.e 1/4 = q/360o i.e q = 360/4 = 90o. Directions: Read the above example carefully and answer the following questions. Also write 10 examples of your own.
 Q 1: Find the angle of the sector of a circle whose area is 2/5 of the circle.144°134°None of these154° Q 2: Find the radius of a circle if the angle of the sector of a circle is given by 270°. The area of the sector is 3/4 of the area of the circle which is 90 cm2.7.35 cm6.35 cm5.35 cm8.35 cm Q 3: Find the radius of a circle if the angle of the sector of the circle is given by 240°. Also the area of the sector is 2/3 times the area of the circle which is 70 cm2.5.73 cm4.73 cm3.73 cmNone of these Q 4: Find the angle of the sector of a circle whose area is 5/12 of the circle.None of these160°140°150° 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