A circle with a diameter of 10 cm, draw the largest square in it. What's the area of the square
The area of a square = the square of the diagonal
10x10÷2=50cm2
The area of a square is 50 square centimeters
Cut out the largest square on a circular piece of paper with a diameter of 10 cm. What is the area of the square
If the square is the largest, the diagonal length is 10cm in diameter
S Square = diagonal × diagonal / 2 = 50 square centimeter
Hjhxrz is from the math coaching team
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- 1. Cut out the largest square on a round piece of paper with a diameter of 10 cm. The square has an area of () m2
- 2. The diameter of a circle is 4.8cm, the circumference is () cm, the radius is () cm, and the area is () square centimeter
- 3. The area of the ring is 200 cm square, the radius of the outer circle is 10 cm, and the radius of the inner circle is 10 cm
- 4. The circle shape, its area is the second power of 200cm, the outer radius of the big circle is 10cm, the inner radius of the small circle is what? Solve by equation
- 5. The surface area and volume of the large cuboid are () cm2 and () cm3 respectively
- 6. The edge length of a cube is 12 cm. If the edge length is increased by 2 times, the sum of its edge lengths will be increased by () times, its volume will be increased by () times, and its surface area will be increased by () times
- 7. After a 150cm long iron wire is used to make a cube frame, 6cm iron wire is left. How long is the edge of the cube?
- 8. There is a 96 cm long wire, which just forms a cube frame 1. How many meters is the edge length of this cube? 2. Color paper is pasted on each surface. How much color paper do you need? 3. What's the volume of a cuboid with six such squares?
- 9. With 60 cm long wire welded into a cube frame, the surface area of the cube is () square centimeter?
- 10. The length of an iron wire is 36cm. If it is made into a cube frame, the edge length is () cm. If it is made into a cuboid frame of 3cm high and 2cm wide, the length is () It's better to have an explanation
- 11. Saw the largest circle on a square board with a side length of 20 cm. The area of the circle is______ Square centimeter. What's the rest of the leftover material______ Square centimeter
- 12. A 6N cube wood block with a side length of 10cm is put into the water tank. When 5cm water is added, it is found that the wood block still sinks to the bottom of the water, and the buoyancy of the wood block is calculated
- 13. A cube copper block with side length of 0.1M and mass of 4.45kg was placed on the horizontal table, Calculate: 1 the gravity of the copper block 2 please calculate and explain whether the copper block is hollow or solid
- 14. A cube copper block with side length of 0.1M is placed on the horizontal table top of 1 square meter, and the pressure of the copper block on the horizontal table top is calculated Density of copper block = 8.9 times 10 cubic kg / m3
- 15. The cube copper block with the volume of 1dm ^ 3 is placed in the center of the horizontal tabletop with the area of 1m ^ 2. How much pressure does it exert on the tabletop? (g = 10N / kg, flexible copper = 8.9 × 10 ^ 3kg / m ^ 3)
- 16. A container with a weight of 2n, a bottom area of 0.01M and a depth of 0.05 is filled with 8N water
- 17. When object a weighing 1.5n is still in water in a cylindrical container with a bottom area of 100cm2 When the object a weighing 1.5n is still in the water of a cylindrical container with a bottom area of 100cm2, 2 / 5 of the volume of the object is exposed on the water surface, and the depth of the water is 10cm. If an object B is placed on the object a, they are just suspended in the water, and the pressure of the water on the bottom of the container is 1200pa Ask for: (1) The density of object a; (2) The density of object B
- 18. As shown in the figure, the area of the top bottom of a round table object is 2 / 5 of the area of the bottom. When it is placed on a table, the pressure on the table is 200 PA How much pressure does it put on the table?
- 19. The area of the top bottom of a cone-shaped object is 2 / 3 of the area of the bottom. As shown in the figure, if you put it on the table (the big side is below), the pressure on the table is 200 PA Turn it over. What's the pressure on the table,
- 20. An object with a volume of 100cm and a bottom area of 10cm is placed on a horizontal table with a pressure of 2 × 10 PA