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} =
·
√4.32^{2} - ((15-7)^{2}+4.32^{2}-4.65^{2}
2·(15-7)
)^{2} =
·
√4.32^{2} - (8^{2}+4.32^{2}-4.65^{2}
2·8
)^{2} =
·
= 11
·
= 11
·
√18.6624 - 3.815^{2}
= 11
·
√18.6624 - 14.554225
= 11
·
√4.108175
= 11
·
2.027
=
22.297
Answer: trapezoid area with sides 7,15,4.32,4.65 equal to 22.297