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Formula for perimeter

Permeter =80 feet lengh = 15 base = ?

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The base is one of the four sides, since you know that it has to have another side that is the same length you double it. So the base and the top are 30. Now you take the perimeter and subtract that so you have 80 minus 30 which leaves 50. This is split between the sides so one side is 25 and the other is the same. The dimensions are 15+15+25+25

Posted on Mar 28, 2014

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Heron's Formula if you have the length of the three sides. Let those measures be a, b, and c.
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Use the formula depending on what is given
If one side and vertical height from that side to the opposite vertex is given, use the formula 1/2 of basexheight
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sq root of [ s(s-a)(s-b)(s-c)] where a,b, c are the 3 sides and s is semi- perimeter.
Familiarise with formulae to solve Maths problems.
If it is helpful, please give a rating.
Have a nice day
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