A trapezoid, after its bottom is shortened by 5 cm, becomes a square, and the area is reduced by 20 square cm. What is the area of the original trapezoid?

20 × 2 / 5 = 8 (CM), (8 + 5 + 8) × 8 / 2, = 21 × 8 / 2, = 84 (square cm); answer: the original trapezoid area is 84 square cm

The area of a trapezoid is twice that of a triangle______ (judge right or wrong)

Because the top and bottom of the trapezoid are not equal, the areas of the two triangles are not equal, and the area of the trapezoid is not twice that of the triangle

Two exactly the same right angle trapezoid into a rectangle, the area is 300 square centimeters, one of the trapezoid area is___ Square centimeter

A: the area of each trapezoid is 150 square centimeters. So the answer is: 150

As shown in the figure, the area of the rectangle is 70 square centimeters, the upper bottom of the trapezoid is 3 / 7 of the length of the rectangle, and the lower bottom is 4 / 5 of the length of the rectangle

The shadow area is about the area other than trapezoid
Let the length of a rectangle be a and the width be B, then a * b = 70
The length of the top bottom of trapezoid is 3A / 7, the length of the bottom bottom is 4A / 5, and the height is B
So the area of trapezoid is: (3a / 7 + 4A / 5) * B / 2 = 43 / 70 * AB = 43 / 70 * 70 = 43
So the shadow area is: 70-43 = 27

It is known that the top bottom of trapezoid is 2 cm long and the bottom is 4 cm long. The area of right triangle is 4.5 square cm

Let the trapezoid height be H
(4-2)/2*h/2=4.5
h=9
Area = (4 + 2) * 9 / 2 = 27 cm2

A right triangle with an area of 300 square centimeters, one right side is 20 meters, the other right side is () meters

If the area is 300 square meters
300X 2 / 20 =30m
A right triangle with an area of 300 square meters, one right side is 20 meters, the other is (30) meters
If the area is 300 square centimeters
Then 300 sq cm = 0.03 sq m
0.03X2 / 20 =0.003m
A right triangle with an area of 300 square centimeters, one right side is 20 meters, the other is (0.003) meters

Two identical right angled trapezoids can be put together into a () shape. The sum of the top and bottom of the trapezoid is rectangular. The area of the trapezoid is equal to the area of the rectangle

Two identical right angled trapezoids can be put together into a (rectangular) shape. The sum of the top and bottom of the trapezoid is rectangular (long), and the area of the trapezoid is half of that of the rectangle

The area of a rectangle made up of two identical right angled trapezoids is 300 square centimeters, and the area of one right angled trapezoid is () square meters

0.015 M2

A trapezoid, the bottom minus 6 cm, into a parallelogram, the bottom minus 3 cm, into a triangle, at this time the area reduced by 6 square centimeters, the original trapezoid area
Expression

The bottom is reduced by 6cm to form a parallelogram,
It means that the bottom is 6 cm longer than the top,
The length of the top and bottom is reduced by 3cm to form a triangle, which means that the length of the top and bottom is 3cm,
At this time, the area is reduced by 6 square centimeters. The reduced area is the area of a triangle with the upper bottom of the trapezoid as the bottom and the height of the trapezoid as the height. Therefore, the height of the original trapezoid is: 6 * 2 / 3 = 4cm,
Therefore, the original trapezoid area is: (3 + 3 + 6) * 4 / 2 = 24 square centimeters
I hope my answer can help you

For a trapezoid, the bottom increases by 6.4cm to become a parallelogram, the bottom decreases by 5.8cm to become a triangle, and the area decreases by 21.46cm2?

The height is 1 / 2 * h * 5.8 = 21.46
Trapezoid area 1 / 2 * h * (5.8 + 5.8 + 6.4) = 66.6

A trapezoid, after its bottom is shortened by 5 cm, becomes a square, and the area is reduced by 20 square cm. What is the area of the original trapezoid?