The sides 2

The sides of a trapezoid are in the ratio 2:5:8:5. The trapezoid's area is 245. Find the height and the perimeter of the trapezoid.

Correct answer:

h =  14
o =  70

Step-by-step explanation:

a:b:c:d=2:5:8:5 a = 8x b=d=5x c = 2x a  c  S=245  h = d2  ((ac)/2)2 h = x   52  ((82)/2)2  h = x   52  ((82)/2)2 h = x   16 h = 4x  S = 2a+c h S = 28x+2x h S = 28x+2x    4x S = 5x    4x x=S/20=245/20=27=321=3.5  h=4 x=4 3.5=14
a=8 x=8 3.5=28 b=5 x=5 3.5=235=1721=17.5 d=5 x=5 3.5=235=1721=17.5 c=2 x=2 3.5=7  S1=2a+c h=228+7 14=245 S1=S  o=a+b+c+d=28+235+7+235=70



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Showing 1 comment:
Math student
I don't understand.





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