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 - Mathematics9.5 Diameter of a Circle - II

 Example: The area of a circle is 9.625 sq cm. Find its diameter. Solution: Given that, The area of a circle (A) = 9.625 sq cm. If the radius of the circle is r cm. A = pr2. 9.625 = 22/7 * r2 r2 = (9.625 * 7) / 22 r2 = 3.0625 Take square roots on both sides. r = 1.75 Therefore, the radius of the circle is 1.75 cm. So, the diameter = 2r = 2 * 1.75 = 3.5 cm. Directions: Read the above example carefully and answer the following questions. Also write at least 10 examples of your own.
 Q 1: The area of a circle is 498.96 sq cm. Find its radius.32.5 1cm12.61 cm16.51 cm25.21 cm Q 2: Find the area of the circle if its radius is given by 0.35 cm.1 sq cm1.54 sq cm0.385 sq cm1.4 sq cm Q 3: The area of a circle is 346.5 sq cm. Find its diameter.17 cm10.5 cm21 cm15 cm Q 4: The area of a circle is Ö361 sq cm. Find its diameter.6.23 cm5.55 cm3.25 cm4.92 cm Q 5: Find the area of a circle its diameter is given by 35 cm.915.5 sq cm925.5 sq cm945.5 sq cm962.1 sq cm Q 6: The area of a circle is 6.16 sq cm. Find its radius.1.4 cm28 cm14 cm2.8 cm Question 7: This question is available to subscribers only! Question 8: 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