The base length of a parallelogram is 8dm, the height is 4dm, the area is () square decimeter, and the area of a triangle with the same base and height is () square decimeter

The base length of a parallelogram is 8dm, the height is 4dm, the area is () square decimeter, and the area of a triangle with the same base and height is () square decimeter

A parallelogram has a base length of 8dm, a height of 4dm and an area of (32) square decimeters
The area of a triangle equal to its base and height is (16) square decimeters

As shown in the figure on the left, a rectangle is divided into two rectangles by a straight line. The ratio of the width of the two rectangles is 1:3. If the area of the shadow triangle is 1 square centimeter
What is the area of the original rectangle

1 times 2 divided by 3 times (3 + 1) = 8 / 3

The ratio of the height to the bottom of an isosceles triangle is 4:3. If it is cut along the height to form a rectangle with a circumference of 9cm, what is the area of the original triangle

Bottom: 9 △ (2 × 4 + 3) × 3 = 27 / 11
Height: 27 / 11 × 4 / 3 = 36 / 11
Area: 36 / 11 × 27 / 11 △ 2 = 486 / 121