The nine small squares with the side length of 2 cm are arranged into a big square. The perimeter of the big square is () A. 24 cm B. 36 cm C. 38 cm

The nine small squares with the side length of 2 cm are arranged into a big square. The perimeter of the big square is () A. 24 cm B. 36 cm C. 38 cm

According to the title, draw the picture as follows, the perimeter of the square: (3 × 2) × 4, = 6 × 4, = 24 (CM). Answer: the perimeter is 24 cm

A small house is composed of an equilateral triangle and a square. The perimeter of this figure is 32cm. How many cm are the sides of the square

The perimeter of 5 equal sides (32 / 5) X4 = 25.6cm

It is known that the perimeter of right triangle is 36 cm, and the median length of hypotenuse is 7.5 cm

Because the length of the hypotenuse and the middle line is 7.5, the length of the hypotenuse is 15, so the sum of the two right angles is 36-15 = 21. Let the lengths of the two right angles be a and B respectively, then we already know: a + B = 21 and a ^ 2 + B ^ 2 = 15 ^ 2 (Pythagorean theorem). Therefore, a * b = 2Ab / 2 = (a ^ 2 + 2Ab + B ^ 2 - A ^ 2 - B ^ 2) / 2 = ((a + b) ^ 2 - (a ^ 2