ISO triangle

Calculate the area of an isosceles triangle KLM if its sides' length is in the ratio k:l:m = 4:4:3 and has perimeter 377 mm.

Correct result:

S =  6533.4 mm2

Solution:

k=l=44+4+3377=137.091 mm m=34+4+3377=102.818 mm  h2=k2(m/2)2 h=137.091251.4092=127.087 mm  S=12mh=12102.818127.087=6533.4 mm2

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