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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
3.34 Semicircle - I

Example:
The radius of a semicircle is 6.3 cm. find its perimeter.

Solution:
The perimeter of a semicircle is = r(2+p).
Given that,
r = 6.3 cm.
P = 6.3 (2 + 22/7)
= 6.3 [(14+22)/7]
= 6.3 * 36/7
= 2268/7
P = 32.4cm.


Directions: Solve the following problems and correct the answer at two decimal place. Also write at least ten examples of your own.
Q 1: The radius of a semicircle is 15.6 cm. find its perimeter.
None of these
80.23 cm.
80 cm.

Q 2: The radius of a semicircle is 84 cm. find its perimeter.
432 cm.
432.56 cm.
None of these

Q 3: The radius of a semicircle is 9.4 cm. find its perimeter.
48.3 cm.
None of these
48 cm.

Q 4: The radius of a semicircle is 7.4 cm. find its perimeter.
38.6 cm.
None of these
38.06 cm.

Q 5: The radius of a semicircle is 21.7 cm. find its perimeter.
113.6 cm.
112.6 cm.
111.6 cm.

Q 6: The radius of a semicircle is 8.6 cm. find its perimeter.
44.23 cm.
None of these
44.2 cm.

Q 7: The radius of a semicircle is 18.4 cm. find its perimeter.
94.63 cm.
94.6 cm.
None of these

Q 8: The radius of a semicircle is 16.8 cm. find its perimeter.
86.4 cm.
86 cm.
None of these

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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