The two right sides of a right triangle are 30cm and 40cm, the hypotenuse is 50cm, and the height of the hypotenuse is 50cm______ cm．

The two right sides of a right triangle are 30cm and 40cm, the hypotenuse is 50cm, and the height of the hypotenuse is 50cm______ cm．

30 × 40 ﹣ 2 × 2 ﹣ 50 = 1200 ﹣ 50 = 24 (CM)

The length of the diagonal is 2cm, and the side length of the square is 2cm______ cm．

Let the side length of a square be xcm, then x2 + x2 = 22 = 4; X = 2cm; so the answer is 2

The diagonal length of a square with two sides is______ The area of the new square with the diagonal of the square as the side length is______ ．

The diagonal length of a square with side length 2 is 22, and the area of a new square with side length 2 is 8