Diagonal

he rectangular ABCD trapeze, whose AD arm is perpendicular to the AB and CD bases, has area 15cm square. Bases have lengths AB = 6cm, CD = 4cm. Calculate the length of the AC diagonal.

Correct result:

u =  3.6056 cm

Solution:

S=15 cm2 a=6 cm c=4 cm  S=(a+c)d/2  d=2 S/(a+c)=2 15/(6+4)=3 cm u=d2+(ac)2=32+(64)2=13=3.6056 cm



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