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You want to cut the rectangular paper of 84 cm in length and 72 cm in width into a square paper of the same size to make a lantern. What is the maximum side length of this square paper without any remaining
twelve
If you want to cut the rectangular paper of 84cm in length and 72cm in width into a square paper of the same size to make a lantern, how many cm is the maximum side length?
The greatest common factor of 84 and 72 is 12,
The maximum side length of the cut square paper should be 12cm
Cut the rectangular paper of 84cm in length and 72cm in width into squares of the same size without surplus. What is the maximum area of a small square? How many pieces are there
In addition, if the numbers a and B are non-zero natural numbers and a = 5b, then the greatest common factor of a and B is ()
The greatest common factor of 84 and 72 is 12
The area of small square is the largest; 12 × 12 = 144
(84÷12）×（72÷12）
=7×6
=42 (pieces)
If the numbers a and B are non-zero natural numbers and a = 5b, then the greatest common factor of a and B is (b)
Cut a piece of rectangular paper 108 cm in length and 84 cm in width into a square of the same size and as large as possible. There is no paper left. At least it can be cut into a square
How many squares
108＝2×2×3×3×3
84＝2×2×3×7
The greatest common factor of 108 and 84 is 2 × 2 × 3 = 12
So the side length of square paper is 12 cm
It can be cut into (108 ／ 12) × (84 ／ 12) = 63 pieces at least
There is a rectangular piece of paper, 84 cm long and 56 cm wide. Now it needs to be cut into several equal squares without any surplus. Each square has the longest side
How many? How many squares can you cut into?
Six, 28 sides
On a square piece of paper with an area of 100 square centimeters, cut out the largest circle. The circumference of the circle is () cm and the area is
Square area of 100 square centimeters, side length is 10 cm, 10 cm is cut into the largest circle diameter, the radius of the circle is 5 cm
Circumference of the largest circle cut: 3.14 × 10 = 31.4 (CM)
Area of the largest circle cut: 3.14 × 5 & # 178; = 78.5 (square centimeter)
The side length of a piece of square paper is 12 decimeters. Cut it into the largest circle. How many decimeters is the circumference of this circle
The diameter of the largest circle is equal to the side length of the square, equal to 12 decimeters
The circumference of this circle is 3.14 × 12 = 37.68 decimeters
Draw the largest circle in a rectangle 22 cm long and 2 decimeters wide. The circumference of the circle is______ What is the area______ ．
2 decimeter = 20 cm; radius of circle: 20 △ 2 = 10 (CM); perimeter: 3.14 × 20 = 62.8 (CM); area: 3.14 × 102 = 3.14 × 100 = 314 (square cm); so the answer is: 62.8 cm, 314 square cm
The perimeter of a square and a circle is equal. The diameter of the circle is 8 decimeters. The side length of the square is () decimeters. The area of the circle is 2
Side length 2 π is 6.28 decimeters
The area is 4 π square, that is 39.44 square decimeters
A cube has an area of 16 square decimeters. What is the surface area and volume of the cube?
For a cube, the area of one face is 16 square decimeters, so the edge length of the cube is 4 decimeters
Its surface area is 4 * 4 * 6 = 96 square decimeters
The volume is 4 * 4 * 4 = 64 cubic decimeters
RELATED INFORMATIONS
- 1. 1. The surface area of a cube is 8.64 square decimeters, and the area of a surface is () 2. Weld a 36 cm long iron wire into a cube frame. Its edge length is () cm 3. The area of one side of a cube is 25 square centimeters, and the sum of its edges is () centimeters 4. A 48 cm long iron wire can be welded into a cuboid of 5 cm long, 4 cm wide and () cm high 5. After a cuboid block is cut into two pieces, the surface area increases by 12 square centimeters. What is the surface area of this cuboid?
- 2. The bottom area of a cube is 25 square decimeters, its surface area is (square decimeters), and its volume is () cubic meters
- 3. The bottom area of a cube is 25 square meters, so its surface area is () square meters, and its volume is () cubic meters
- 4. Use a 24 decimeter iron wire to weld the largest cube frame. What is the surface area and volume of the cube
- 5. A 84 decimeter long iron wire is made into a cube frame. The surface area of the cube is () square decimeter, and the volume is () cubic decimeter fast
- 6. A 48CM long iron wire is welded into a cube frame (the joint is ignored). The surface area of the cube is () square centimeter and the volume is () cubic centimeter
- 7. A 48 cm long wire is welded into a cube frame. What is the volume of this frame? Analytical formulation
- 8. A 24 cm long iron wire is welded into the largest cube model. What is the surface area and volume?
- 9. There is a 150cm long iron wire. After welding the wire into a cube, there is 6cm iron wire left. What is the surface area and volume of the cube? 2. When two cubes are used to make a cuboid, the sum of edge lengths is reduced by 32dm, and how much is the surface area reduced? 3. A cuboid is cut into two identical cubes, and the sum of the edges is increased by 24cm?
- 10. A 60 cm long wire is welded into a cube model. What is the surface area and volume of the cube? A school uses lime to paint the four walls and ceiling of the classroom. The room is 8 meters long, 6 meters wide and 4 meters high, deducting 15 square meters of doors and windows. If 0.25 kg of lime is used per square meter, how many kg of lime do you share? I'll see you later, little sister!
- 11. How many pieces of rectangular iron pieces, 90cm long and 42cm wide, should be cut into square iron pieces with the same area and the same number of centimeters, if there is no surplus?
- 12. Three equal size squares, put together into a rectangle, the circumference of this rectangle is 24 cm, the side length of each square is 24 cm______ Centimeter. What's the area of this rectangle______ Square centimeter
- 13. A rectangular cardboard, 1.6 decimeters long, 8 cm wide, cut diameter is 4 cm circle, how many can cut at most?
- 14. Draw a quadrilateral with only one axis of symmetry, and then draw a quadrilateral with only two axes of symmetry
- 15. Choice: a rectangle is 12 cm long and 8 cm wide. If you cut a square with 2 cm side length around it, the perimeter of the figure will be left A. Decrease 16cm B, unchanged C, increase 16cm
- 16. There is a 24 cm long, 18 cm wide rectangular iron sheet, which is welded into a box without a cover by subtracting the square with a side length of 4 cm from the four corners, What's the surface area of this box
- 17. You need at least () cm long wire to make a cuboid frame with a perimeter of 18 cm at the bottom and a height of 5 cm
- 18. Make a cuboid oil tank without cover with iron sheet. The bottom is a square with side length of 2 decimeters and the height is 1.5 meters. How much iron sheet do you need to make such an oil tank?
- 19. A rectangular piece of paper is 60 cm long. After cutting off the largest square, a small rectangle is left. What is the perimeter of this small rectangle?
- 20. A cuboid is 26 cm high. It is cut into two cuboids horizontally. The surface area is increased by 80 square cm