Question 3
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How many sides does the polygon have?
I. It has 20 diagonals.
II. Its interior angles add up to 1,080°.
- A Statement I alone is sufficient, but Statement II alone is not sufficient
- B Statement II alone is sufficient, but Statement I alone is not sufficient
- C Each statement alone is sufficient Correct
- D Both statements together are sufficient, but neither statement alone is sufficient
- E Statements I and II together are not sufficient
Correct Answer: Option C
I: n(n − 3)/2 = 20 → n = 8. Sufficient.
II: (n − 2) × 180 = 1,080 → n = 8. Sufficient.
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