2
Answer: DSet 12: Linear Equations (Intermediate)
Explanation
The sum of interior angles of an n-sided polygon is S = 180(n - 2). Solve for n.
Solve for n.
A.
n = (S + 2) / 180
B.
n = S/180 - 2
C.
n = 180S + 2
D.✓ Correct
n = S/180 + 2
Detailed Explanation
Choice D is correct. Divide by 180: S/180 = n - 2. Add 2: n = S/180 + 2.
Key Steps:
•
The correct answer is n = S/180 + 2
Why others are wrong:
A: Choice A is incorrect and may result from a calculation error.
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
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