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} =
·
√1^{2} - ((69.3-80.4375)^{2}+1^{2}-18.5625^{2}
2·(69.3-80.4375)
)^{2} =
·
√1^{2} - (-11.1375^{2}+1^{2}-18.5625^{2}
2·-11.1375
)^{2} =
·
√1 - (124.04390625+1-344.56640625
-22.275
)^{2} = 74.86875
·
= 74.86875
·
√1 - 9.855^{2}
= 74.86875
·
√1 - 97.121025
= 74.86875
·
√-96.121025
= 74.86875
·
NAN
=
NAN
Answer: trapezoid area with sides 80.4375,69.3,1,18.5625 equal to NAN