Trapezoid area with sides 54,55,12,24 equal to NAN
where a and b are bases, h is height
where m is the middle line, h is the height
where d1,d2 are diagonals, α° is the angle between them
A trapezoid is a quadrilateral whose two sides are parallel (bases) and the other two are not parallel (sides).
Trapezoid area formula 
where a and b are the bases, c and d are the sides
where r is the radius of the inscribed circle, α° is the angle between the base and the sideSolution:
S =
a+b
2
·
√c2 - ()2
(b-a)2+c2-d2
2·(b-a)
=
54+55
2
·
√122 - ()2
(55-54)2+122-242
2·(55-54)
=
109
2
·
√122 - ()2
12+122-242
2·1
=
109
2
·
√144 - ()2
1+144-576
2
= 54.5
·
√144 - ()2
-431
2
= 54.5
·
√144 - -215.52
= 54.5
·
√144 - 46440.25
= 54.5
·
√-46296.25
= 54.5
·
NAN
=
NAN
Answer: trapezoid area with sides 54,55,12,24 equal to NAN