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Grade 8 - Mathematics
3.35 Semicircle - II

Example:
The radius of a semicircle is 6.3cm. Find its area.

Solution:
Area of semicircle = 1/2 * pr2
Given that,
r = 6.3cm.
A = 1/2 * 22/7 * (6.3)2
A = 11/7 * 6.3 * 6.3
A = 436.59/7
A = 62.37 Sq. cm.


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 6.5 cm. Find its area.
None of these
66.56 Sq. cm.
66.4 Sq. cm.

Q 2: The radius of a semicircle is 15.4 cm. Find its area.
372.68 Sq. cm.
none of these
372.49 Sq. cm.

Q 3: The radius of a semicircle is 18.6 cm. Find its area.
543.65 Sq. cm.
None of these
543.46 Sq. cm.

Q 4: The radius of a semicircle is 7.6 cm. Find its area.
90.77 Sq. cm.
None of these
90.74 Sq. cm.

Q 5: The radius of a semicircle is 17.6 cm. Find its area.
None of these
486.77 Sq. cm.
486.57 Sq. cm.

Q 6: The radius of a semicircle is 29.7 cm. Find its area.
1386.14 Sq. cm.
None of these
1386.26 Sq. cm.

Q 7: The radius of a semicircle is 5.4 cm. Find its area.
None of these
45.83 Sq. cm.
45.56 Sq. cm.

Q 8: The radius of a semicircle is 19.8 cm. Find its area.
None of these
616.07 Sq. cm.
616.27 Sq. cm.

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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