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The sum of the interior angles of a pentagon is 6x + 6y. Find y...

Mathematics
JAMB 2004
The sum of the interior angles of a pentagon is 6x + 6y. Find y in the terms of x
  • A. y = 90 - x
  • B. y = 150 - x
  • C. y = 60 - x
  • D. y = 120 -x
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Correct Answer: Option A
Explanation
6x + 6y = (n - 2) 180
6x + 6y= (5 - 2) 180
6(x + y) = 3 * 180
x + y = (3 * 180)/6
x + y = 90o
y = 90 - x

There is an explanation video available below.

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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts