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} =
·
√4.22^{2} - ((2.46-2.13)^{2}+4.22^{2}-4.22^{2}
2·(2.46-2.13)
)^{2} =
·
√4.22^{2} - (0.33^{2}+4.22^{2}-4.22^{2}
2·0.33
)^{2} =
·
√17.8084 - (0.1089+17.8084-17.8084
0.66
)^{2} = 2.295
·
= 2.295
·
√17.8084 - 0.165^{2}
= 2.295
·
√17.8084 - 0.027225
= 2.295
·
√17.781175
= 2.295
·
4.217
=
9.678
Answer: trapezoid area with sides 2.13,2.46,4.22,4.22 equal to 9.678