Trapezoid area with sides 3.72,2.4,1,1.73 equal to 3.045
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)
=
3.72+2.4
2
·
√12 - ()2
(2.4-3.72)2+12-1.732
2·(2.4-3.72)
=
6.12
2
·
√12 - ()2
-1.322+12-1.732
2·-1.32
=
6.12
2
·
√1 - ()2
1.7424+1-2.9929
-2.64
= 3.06
·
√1 - ()2
-0.2505
-2.64
= 3.06
·
√1 - 0.0952
= 3.06
·
√1 - 0.009025
= 3.06
·
√0.990975
= 3.06
·
0.995
=
3.045
Answer: trapezoid area with sides 3.72,2.4,1,1.73 equal to 3.045