Trapezoid area with sides 28,28,6.95,5.85 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)
=
28+28
2
·
√6.952 - ()2
(28-28)2+6.952-5.852
2·(28-28)
=
56
2
·
√6.952 - ()2
02+6.952-5.852
2·0
=
56
2
·
√48.3025 - ()2
0+48.3025-34.2225
0
= 28
·
√48.3025 - ()2
14.08
0
= 28
·
√48.3025 - INF2
= 28
·
√48.3025 - INF
= 28
·
√-INF
= 28
·
NAN
=
NAN
Answer: trapezoid area with sides 28,28,6.95,5.85 equal to NAN