In this equation, n = # of sides
Area = n * (side length)² / 4*tan (180 / n)
Area = 5 * 4² / 4 * tan (36)
Area = 80 / 4 * 0.72654
<span><span><span>Area = 80 / 2.90616
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Area =
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27.5277341922
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Source:
http://www.1728.org/polygon.htm
This is an arithmetic sequence with a common difference of 1.23...that means u add 1.23 to each term to find the next term.
1.31 + 1.23 = 2.54
2.54 + 1.23 = 3.77
3.77 + 1.23 = 5 <== ur next term
Answer is i
also if you have more of these problems use (socratic) it works wonders!
Because they are the same equation, just rewritten in a different way.
s = 4p
divide both sides by 4 to get the other equation:
(1/4)s = p
Answer:
a = - 4
Step-by-step explanation:
Given x = - 2 is a root then f(- 2) = 0
f(x) = x³ + x² + ax - 4, thus
f(- 2) = (- 2)³ + (- 2)² - 2a - 4 = 0, that is
f(- 2) = - 8 + 4 - 2a - 4 = 0, thus
- 8 - 2a = 0 ( add 8 to both sides )
- 2a = 8 ( divide both sides by - 2 )
a = - 4
