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 bases, h is height
A trapezoid is a quadrilateral whose two sides are parallel (bases) and the other two are not parallel (sides).
Trapezoid area formula
where m is the middle line, h is the height
A trapezoid is a quadrilateral whose two sides are parallel (bases) and the other two are not parallel (sides).
Trapezoid area formula
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
A trapezoid is a quadrilateral whose two sides are parallel (bases) and the other two are not parallel (sides).
Trapezoid area formula
where r is the radius of the inscribed circle, α° is the angle between the base and the side
Solution:
S =
·
√c^{2} - ((b-a)^{2}+c^{2}-d^{2}
2·(b-a)
)^{2} =
·
√82.02^{2} - ((265.159-280.2955)^{2}+82.02^{2}-86.65^{2}
2·(265.159-280.2955)
)^{2} =
·
√82.02^{2} - (-15.1365^{2}+82.02^{2}-86.65^{2}
2·-15.1365
)^{2} =
·
√6727.2804 - (229.11363225+6727.2804-7508.2225
-30.273
)^{2} = 272.72725
·
= 272.72725
·
√6727.2804 - 18.228^{2}
= 272.72725
·
√6727.2804 - 332.259984
= 272.72725
·
√6395.020416
= 272.72725
·
79.969
=
21809.725
Answer: trapezoid area with sides 280.2955,265.159,82.02,86.65 equal to 21809.725