In a set of opposite sides of a square, one side is increased by 16 cm, and the other side is decreased by 11 cm. In this way, it becomes a trapezoid. What is the area of the trapezoid

In a set of opposite sides of a square, one side is increased by 16 cm, and the other side is decreased by 11 cm. In this way, it becomes a trapezoid. What is the area of the trapezoid

There seems to be a lack of conditions
I remember when I made it a few days ago, the length of the bottom is 4 times that of the top
The top and bottom of trapezoid are: (16 + 11) / (4-1) = 9 (CM)
The bottom is: 9 × 4 = 36 (CM)
Height: 9 + 11 = 20 (CM)
The area is: (9 + 36) × 20 △ 2 = 450 (square centimeter)

The area of a trapezoid is 51 cm, the upper bottom is 7.6 cm, and the lower bottom is 9.4 cm. How high is it?

Let the height of trapezoid be x cm
（7.6+9.4）x÷2=51
17x÷2=51
17x=102
x=6
A: the height of this trapezoid is 6cm

As shown in the figure, the perimeter of the square is 28cm. Find the area of the trapezoid. (unit: cm)

The area of trapezoid is 73.5 square centimeter

A trapezoid, the lower end of the shorten 2 cm, just become a square, the square perimeter is 28 cm, the original trapezoid area is () square centimeter

Square side length = 28 △ 4 = 7 cm
Top and bottom = 7 cm
Bottom = 7 + 2 = 9cm
Height = 7 cm
Trapezoid area = (7 + 9) × 7 △ 2 = 56 square centimeter