Four sides of trapezoid

Calculate the area of the ABCD trapezoid with sides a = 65 cm, b = 29 cm, c = 40 cm, d = 36 cm

Correct answer:

S =  1512 cm2

Step-by-step explanation:

a=65 cm b=29 cm c=40 cm d=36 cm  k1=a+c4 (ac)=65+404 (6540)=2120=1.05 S1=(a+bc+d) (abc+d) (a+bcd) (a+b+c+d)=(65+2940+36) (652940+36) (65+294036) (65+29+40+36)=1440 cm2  S=k1 S1=1.05 1440=1512 cm2



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