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There is a 9dm long cuboid wood which is sawed into two sections parallel to the bottom. The total surface area of the two sections is 3dm2 more than that of the original cuboid Find the volume of the original cuboid
Saw two more bottoms
So the bottom area is 3 △ 2 = 1.5 square decimeters
1.5×9=13.5
A: the volume of the original cuboid is 13.5 cubic decimeters
The volume of a rectangle is 60dm, the length is 3DM, and the width is 4dm. What is its height and area?
The height is 5DM and the surface area is 94dm2
If one side of a square is 3, then its diagonal length is -. If the diagonal of a square is 2, then the side length is - and the perimeter is__ . the area is -
If the area of a square is 4 square centimeters, then its diagonal length is -
BD is a diagonal of square ABCD, ad = De, point E is on BD, and ad = De, then the angle BAE=____ .
What condition can be added to a rectangle to get a square?
What condition can diamond add to get square?
The length of one side of a square is 3, and the diagonal is 3 √ 2
The diagonal of the square is 2, the side length is √ 2, the perimeter is 4 √ 2, and the area is 2
The square area is 4 square centimeters, and the diagonal line is 2 √ 2 centimeters
∠ BAE = 22.5 degrees [90 - (180 - 90 / 2) / 2]
Rectangle + adjacent equal = square
Diamond + 90 degree angle = square
Take the diagonal of the square as the side length, make another square, and find the similarity ratio, perimeter and area ratio of the two squares
Please draw a picture if you can
The similarity ratio and perimeter ratio were 1: root 2 and the area ratio was 1: 2
The side length of a square is a quarter of a decimeter, its perimeter is (), and its area is ()
The side length of a square is a quarter of a decimeter, its perimeter is (1 decimeter), and its area is (1 / 16 square decimeter)
A square with a side length of 4 decimeters, equal in circumference and area
Wrong. Perimeter and area units are different
The side length of a square is 8 decimeters. What are its area and perimeter
Help me, prawns
thank you
The area is 8 × 8 = 64 square decimeters
The perimeter is 4 × 8 = 32 decimeters
Is a square with a circumference of 4 decimeters equal to a square with an area of 100 square centimeters?
Equal
If the perimeter is 4 decimeters, the side length is 1 decimeter, that is 10 cm
So the area is 100 square centimeters
The area of a square is 81 square decimeters. What's its perimeter
36 decimeters
Know square area, how to work out square perimeter? Known square area is 81 square meters
Know the square area, how to calculate the perimeter of the square? Known square area is 81 square meters. I need to calculate the whole process
Side * side = 81
One edge = 9
Perimeter = side length * 4
=36
RELATED INFORMATIONS
- 1. The surface area of a 8dm long cylinder wood is reduced by 56.52dm2 after cutting a 3DM long cylinder wood along the bottom. Please calculate the remaining volume
- 2. A cuboid has a length of 0.4 DM, a width of 0.3 DM, a height of 0.2 mm, a bottom area of () square decimeter, and a surface area of () square decimeter
- 3. There are 35 floors, 15 black tiles and 20 white tiles. If the floor area is 28 square meters, what are the areas of white tiles and black tiles
- 4. There are 1760 pieces of red and white tiles, 60% of which are red and 514 pieces of which are white. There are as many tiles left. How many are the two kinds of tiles Fang Chengjie
- 5. Some of the same rooms need floor tiles Every day, 4 skilled fitters approve to decorate 5 rooms, but 3 square meters of floor is not decorated. Every day, 6 junior fitters install another 5 square meters of floor in addition to 7 rooms. It is known that a skilled fitter installs 3 square meters more than a junior fitter every day. How much floor area of this room should be decorated
- 6. Xiao Li's new home is 80 decimeters long floor tiles, laying the ground, need 200 fast, if you use an area of 1 square decimeter square tiles to shop, how many pieces do you need How many square meters is the house area of your family? Use proportion to solve the problem
- 7. Ask ceramic tile 800X800 to be equal to how many square?
- 8. The swimming pool is 50 meters long, 25 meters wide and 2 meters deep. How many tiles are needed to paste 4 square decimeters on its four walls and bottom?
- 9. The auditorium is 10 meters long, 10 meters wide and 3 meters high. It needs 80 yuan per square meter to paste 1.2 meters high bricks around the auditorium. How much is the total cost?
- 10. A room is 8.1m long and 5.2m wide. Now we need to lay 0.6m square floor tiles. Is 100 pieces enough? (regardless of loss.)
- 11. A classroom is 12 meters long and 6 meters wide. How many pieces do you need if you use the floor tiles with a side length of 3 decimeters to lay the floor of the classroom?
- 12. Xiaodong's bedroom is 4.5 meters long and 2.5 meters wide. Use 0.5 meter square tiles to pave the floor. Are 50 such tiles enough?
- 13. The area of the school computer room is 85 square meters, with 60 cm square tiles on the side. Is 200 pieces enough?
- 14. The area of the conference room is 72 square meters. The floor is made of 800 identical square tiles
- 15. The side length of a square is two seventh of a meter. How many decimeters is its perimeter? How many square decimeters is its area?
- 16. The perimeter of a rectangle is 88 meters. If the length is reduced by 1 / 12 and the width is increased by 2 meters, a square will be obtained. What is the square area? If you use the equation, please use X!!! Don't use X and Y!!! We haven't learned yet
- 17. There are two maps with scales of 1:1000000 and 1:600000 respectively. On these two maps, the distance between a and B is 12 cm, and the distance between a and B is 12 cm
- 18. The actual distance between a and B is 150km. If it is 2.5cm drawn on a map, what is the scale of this map? A rectangular plot is 40 m long and 20 m wide. If the plot is drawn on a 40 cm long and 20 cm wide design drawing, what is the appropriate scale?
- 19. On the map with the scale of 1 / 2500000, the distance between the two cities is 10cm. If we discuss the distance between the two cities on a map, it is 3.125 Cm, what's the scale of that picture?
- 20. On the drawing of 1:20000 scale, the width of a playground is 2 cm and the length is 3 cm. How many square meters is the actual area of the playground?