What is

What is the circumference of an isosceles trapezoid with an area of 106.75 cm2? The lengths of the sides are in the ratio of 1: 3: 2: 1, and the bases are 6.1 cm apart?

Correct answer:

o =  49 cm

Step-by-step explanation:

S=106.75 cm2 v=6.1 cm  a=3x c=2x b=d=1x  S=(a+c)/2 v  a+c=2 S/v  5 x=2 S/v 5 x=2 106.75/6.1  5x=35  x=7  a=3 x=3 7=21 cm c=2 x=2 7=14 cm b=x=7 cm d=x=7 cm  o=a+b+c+d=21+7+14+7=49 cm

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