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The sum of the interior angles of regular polygon is 1800o. How many sides has...

Mathematics
WAEC 2012

The sum of the interior angles of regular polygon is 1800o. How many sides has the polygon?
  • A. 16
  • B. 12
  • C. 10
  • D. 8
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Correct Answer: Option B
Explanation
Sum = (n - 2)180

1800 = (n - 2)180

divide both sides by 180o

\(\frac{1800}{180}\) = (n - 2)\(\frac{180}{180}\)

10 = n - 2

10 + 2 = n

n = 12

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Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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