Land - isosceles trapezoid

Calculate the content and perimeter of the building plot in the form of an isosceles trapezoid with bases 120m, 95m and height 50m.

Correct result:

S =  5375 m2
o =  318.0776 m

Solution:

a=120 c=95 h=50 S=(a+c)/2⋅ h=(120+95)/2⋅ 50=5375 m2
x=(a−c)/2=(120−95)/2=252=12.5 b=h2+x2=502+12.52≐51.5388 o=a+c+2b=120+95+2⋅ 51.5388=318.0776 m

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