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Grade 8 - Mathematics
3.51 Circles and Rings

Directions: Check the given statements are true or false.
Q 1: If the radii of a ring are 10cm. and 5cm. respectively, then its area is 50 Sq.cm.
False
True

Q 2: Formula for area of ring = p(R+r)W.
True
False

Q 3: If the radii of a ring are 7 cm. and 2 cm. then the width is 5 cm.
True
False

Q 4: The semicircles of a circle are symmetric to diameter of a circle.
True
False

Q 5: To find the area of a ring, the two circles of that ring need not be concentric.
True
False

Q 6: Circumference of a circle = pd.
True
False

Q 7: Perimeter of a semicircle is 2pr.
True
False

Q 8: Perimeter of a circle = (36/14)d.
True
False

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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