A square is divided into four equal rectangles. If the perimeter of each small rectangle is 50 cm, how many cm is the perimeter of the square?

A square is divided into four equal rectangles. If the perimeter of each small rectangle is 50 cm, how many cm is the perimeter of the square?

The circumference of each small rectangle is 50 cm
The perimeter of four small rectangles is two more sides than that of a large square
So the perimeter of a square is
50×4×4/6
=400/3

As shown in the figure, the square is divided into four identical rectangles. The circumference of each rectangle is 60 cm. What is the circumference of the square?

A: the circumference of this square is 96cm, so the answer is: 96

Does sin30 ° of trigonometric function in junior high school have a right angle?

Make
Trigonometric function of junior high school is in right triangle, so there must be right angle

Sin 60-sin 30

Sin 60-sin 30
=3 of 3 (√ 3 / 2) - 1 / 2
=1/2-1/2
=0

The surface area of a cuboid is 944 square decimeters, the bottom area is 192 square decimeters, and the perimeter of the ground is 56 decimeters. What is the volume of this cuboid
The surface area of a cuboid is 944 square decimeters, the bottom area is 192 square decimeters, and the perimeter of the bottom surface is 56 decimeters. What is the volume of the cuboid?

Height = (944-192 × 2) △ 56 = 10 decimeters
Volume = 192 × 10 = 1920 cubic decimeter

The surface area of a cuboid is 840 square centimeters, the perimeter of its bottom surface is 60 centimeters, and the bottom area is 120 square centimeters. What is its volume in cubic centimeters

The height is as follows:
(840-120x2)÷60
=600÷60
=10 (CM)
The volume is:
120x10 = 1200 (CC)

The volume of a cuboid is 120 cubic centimeter. Its length, width and height are three continuous natural numbers. The surface area of the cuboid is () square centimeter
A cube iron sheet with a side length of 12 decimeters can be made into a cube iron box with a volume of ()
PS: 2 fill in the blanks,

The volume of a cuboid is 120 cubic centimeters. Its length, width and height are three continuous natural numbers. The surface area of the cuboid is (148) square centimeters. The length, width and height are 4 cm, 5 cm and 6 cm respectively. The surface area of the cuboid is 2 × (4 × 5 + 5 × 6 + 4 × 6) = 148 (square centimeters)

The volume of a cuboid is 120 cubic centimeters. Its length, width and height are three continuous natural numbers. The surface area of the cuboid is () square centimeters?

The volume is 120 cubic centimetres, and the length, width and height are 4cm, 5cm and 6cm
So the surface area is
（4x5+4x6+5x6)x2=148

A cuboid has a surface area of 340 square centimeters, a bottom area of 80 square centimeters, and a bottom perimeter of 36 centimeters. What is its volume in cubic centimeters?
Why divide the perimeter of the bottom by four sides?

The area of the bottom is 80 square centimeters, the perimeter of the bottom is 36 centimeters, and the length and width of the bottom are 10 centimeters and 8 centimeters respectively;
If the height is HCM, the surface area is:
2*（10h+8h+80）=340
The solution is h = 5 (CM)
So the volume is 10 * 8 * 5 = 400 (cm3)

A cuboid with a square bottom has a volume of 603 cubic centimeters and a square bottom has a circumference of 48 centimeters. What is the surface area of the cuboid?

Bottom side length = 48 △ 4 = 12 (CM)
Height = 603 ÷ (12x12) = 4.1875 (CM)
The surface area is as follows
(4.1875x12 + 4.1875x12 + 12x12) x2 = 489 (cm2)
A: the surface area of this cuboid is 489 square centimeters