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Calculate the perimeter of a sector of a circle of radius 9cm…
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Calculate the perimeter of a sector of a circle of radius 9cm and angle 36°
- A. 18cm
- B. (18 + 9π/5) cm
- C. (9 + 9π/5) cm
- D. 9π/5 cm
QUICK ANSWER…
B
SOLUTION…
The perimeter of any shape is the total length of all the sides of the shape. That is, assuming a shape is stretched to form a straight line, the length of this line is called the perimeter of the shape.
For this question, we have a sketch:
Now for the right answer to the above question:
- Option A is incorrect.
- Option B is correct.
- C is incorrect.
- D is not the correct answer.
QUICK TIPS…
You may please note these/this:
- Always remember that the perimeter of any shape is the total length of its outline.
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/ culled from 2016 JAMB-UTME mathematics past question 24 /
