Circumference 46801

Calculate side b and the height of the trapezoid if a = 5.1cm; c = 6.8cm; d = 4.7cm; circumference is 21cm, and the area is 17.85 cm2.

Correct answer:

b =  4.4 cm
v =  3 cm

Step-by-step explanation:

a=5.1 cm c=6.8 cm d=4.7 cm o=21 cm S=17.85 cm2  o = a+b+c+d  b=oacd= cm
S = 2a+c v  v=a+c2 S=5.1+6.82 17.85=3 cm

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