The bottom of a trapezoid is 18 cm. If the bottom is shortened by 8 cm, it will become a parallel 4 deformation and the area will be reduced by 28 square cm. The original area is? Formula to explain the reason. Thank you! Why use 28 / (8 / 2) what does 8 / 2 mean? Thank you for being clear

The bottom of a trapezoid is 18 cm. If the bottom is shortened by 8 cm, it will become a parallel 4 deformation and the area will be reduced by 28 square cm. The original area is? Formula to explain the reason. Thank you! Why use 28 / (8 / 2) what does 8 / 2 mean? Thank you for being clear

Because the lower base is shortened by 8cm, it is a parallelogram, so the upper base is 81-8 = 10cm. Because the area of a triangle is reduced by 28cm2 after shortening 8cm, the height is the same. So 8 * H / 2 = 28 h = 28 * 2 / 8 h = 7cm, so the height of the flat quadrilateral is equal to that of the original trapezoid and the current three shapes. Because the upper base is 10cm, the lower base is 18C

The bottom of a trapezoid is 18 cm, it becomes a parallelogram, the area is reduced by 28 square cm, the area of the original trapezoid is () square cm

7586

There is a rectangular flower bed. If the length increases by 6 meters or the width increases by 4 meters, the area increases by 48 square meters. What is the original area of the flower bed?
Use the formula to solve! The formula is simple and complete
Don't solve the equation

Width = 48 △ 6 = 8
Length = 48 △ 4 = 12
Area = 8 × 12 = 96