The perimeter of a parallelogram is 36 cm, and the heights of the two parallelograms are 4 and 5 respectively

The perimeter of a parallelogram is 36 cm, and the heights of the two parallelograms are 4 and 5 respectively

36÷2×4/（4+5)×5
=18×4/9×5
=8×5
=40 square centimeters

If the height of two parallelograms is 5cm and 8cm respectively, and the shorter side length is 8.5cm, then the perimeter of this parallelogram is L（
If the side lengths of a quadrilateral are a, B, C and D in turn, and the square of a + the square of B + the square of C + the square of D = 2Ac + 2bd, then the quadrilateral is————

According to the equal area of parallelogram, we can find out the length of the long side! The short side should correspond to the length and height: let the length of the long side be: X, then 8.5 * 8 = 5x. If x = 13.6, then its circumference is: 2 * (13.6 + 8.5). From the simplification of the equation: (A-C) * (A-C) + (B-D) * (B-D) = 0