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### Grade 8 - Mathematics3.51 Circles and Rings

 Directions: Check the given statements are true or false.
 Q 1: Formula for area of ring = p(R+r)W.TrueFalse Q 2: The angle at the center of circle is 330°. FalseTrue Q 3: Perimeter of a semicircle is 2pr. FalseTrue Q 4: If the radii of a ring are 7 cm. and 2 cm. then the width is 5 cm.TrueFalse Q 5: To find the area of a ring, the two circles of that ring need not be concentric.FalseTrue Q 6: Circumference of a circle = pd.FalseTrue Q 7: The semicircles of a circle are symmetric to diameter of a circle.TrueFalse Q 8: If the radii of a ring are 10cm. and 5cm. respectively, then its area is 50 Sq.cm.FalseTrue Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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