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What is the side length of a square with an area of 20 square centimeters
2 * radical 5
Known square area is 20 square centimeter, seek side length
Side length: root 20 cm = 2 root 5 cm ≈ 4.472 cm
A cube is cut into two identical cuboids. The surface area is increased by 18 square decimeters. The original surface area is () square decimeters, and the volume is () cubic decimeters
A cube is cut into two identical cuboids. The surface area is increased by 18 square decimeters. The original surface area is (54) square decimeters, and the volume is (27) cubic decimeters
18÷2×6=54
3×3×3 =27
A cube has a surface area of 18 square decimeters. Divide it into two cuboids averagely. How many square decimeters is the surface area of each cuboid? (list the formula)
Area of one face: 18 / 6 = 3
The surface area of each cuboid is: 3 * (2 + 2) = 12
The square area is (x ^ 2-6x + 9) cm ^ 2 (x)
(x^2-6x+9)=(X-3)^2
Because x
The perimeter of a square is 2 meters and the area is () square meters
The perimeter of a square is 2 meters and the area is (0.25) square meters
Use a piece of square paper with a side length of 20 cm to form the largest cylinder. What is the circumference and height of the bottom of the cylinder?
Because in the whole process of enclosure, the square has never changed, and it is stipulated that it must be enclosed into the largest paper tube, so the side length of the square is the circumference of the bottom of the paper tube, that is, 20cm. The height remains unchanged, but it is still the side length of the square, that is, 20cm
Use a piece of square paper with a side length of 6cm to form the largest cylinder. The side area of the cylinder is（
6cm×6cm＝36cm²
A: 36 square centimeters
Use a piece of square paper with a side length of 6cm to form the largest cylinder. The side area of the cylinder is () square centimeter
"Scratch de":
6cm×6cm＝36cm²
A: 36 square centimeters
Good luck and goodbye
Use a piece of square paper with a side length of 20cm to roll it into a paper cylinder. Its bottom circumference and height are?
Find the formula
Not really,
Landlord, if you have to calculate the formula, divide it by 20, but it's better to prove it
RELATED INFORMATIONS
- 1. Use a 20 cm long, 10 cm wide rectangular paper, roll into a cylinder. 2011-2-22 17:54 questioner: mop803 | browsing times: 250 When the height is 10 cm, what is the maximum perimeter of the bottom surface? When the height is 20cm, what is the maximum perimeter of the bottom surface?
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