Isosceles trapezoid

The lengths of the bases of the isosceles trapezoid are in the ratio 5:3, the arms have a length of 5 cm and height = 4.8 cm. Calculate the circumference and area of a trapezoid.

Correct result:

o =  21.2 cm
S =  26.88 cm2

Solution:

r=5 cm v=4.8 cm  x2+v2=r2=52=25 x=r2v2=524.82=75=1.4 cm    3 a=5 c x=(ac)/2 3 a=5 c 1.4=(ac)/2  3a5c=0 ac=2.8  a=7 c=215=4.2  o=a+c+2 r=7+4.2+2 5=1065=1065 cm=21.2 cm
S=a+c2 v=7+4.22 4.8=67225=67225 cm2=26.88 cm2



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