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The volume of a cuboid wood is 216 cubic decimeters, the cross section area is 24 square decimeters, and the length of this wood is () decimeters
It's 9 decimeters
A cuboid wood, 2 meters long, cross-sectional area is 20 square decimeters, its volume is () cubic meters, if
2 meters = 20 decimeters
20 × 20 = 400 cubic decimeter volume
A cuboid wood, 2 meters long, cross-sectional area is 20 square decimeters, its volume is (400) cubic meters
Can Geometer's Sketchpad calculate definite integral
You can do the diagram of calculus, also can carry on the integral calculation, but need to refer to the lesson. There is no integral operation in the system menu
As shown in the figure, in square ABCD, e is the point on DC, connect be, make CF ⊥ be at P, intersect ad at F, if AP = ab
It is proved that am ⊥ be and m. ∪ AMB = ∠ amp = 90 °, ∪ 1 + ∠ 3 = 90 ° & nbsp; & nbsp; & nbsp; ∪ be ⊥ CF ∪ 4 = 90 °∪ AMB = ∠ 4 & nbsp; & nbsp; & nbsp; & nbsp; ∪ quadrilateral ABCD is a square, ∪ AB = BC = CD, ∪ ABC = 90 °. That is ∪ 1 + ∠ 2 = 90 °, ∪ 2 = ∪ 3 ∪ in △ ABM and △ BCP, ∪ AMB = ∪ 4} 3 = 2 & nbsp; AB = BC, ≌ ABM ≌ BCP (AAS) ≌ am = BP & nbsp; & nbsp; & nbsp; ∵ AP = AB, am ⊥ be, ∵ BM = 12bp = 12am. ∵ 2 = ≌ 3, ≌ AMB = ∩ BCE, ∵ ABM ∽ BEC ∩ BMAM = cebc = 12 ∵ BC = DC ≁ CE = 12DC. ∵ e is the midpoint of DC
When the image of the quadratic function y = 2x ^ 2 + 4x + 7 is symmetrical about the line x = 1, the corresponding function expression of the image is? And then the image is symmetrical about the line y = 2, the corresponding function expression of the image is?
For x = 1 symmetry, the vertex is shifted to the right of the straight line x = 1, y = 2 (x + 1) ^ 2 + 5, the vertex is (- 1,5) ‖ quadratic function y = 2x ^ 2 + 4x + 7. After x = 1 symmetry, the vertex of the expression is (1,5) and ∵ the opening of the expression, the degree of bending is unchanged, and the expression is y =
ABCD * 4 is equal to DCBA. ABCD represents different numbers. Ask which four numbers ABCD is
Four digits × 4 = four digits, so thousand bits do not carry ten thousand bits, a = 1 or 2; and because the last bit of integer multiplied by 4 will not be 1, so a = 2; if the last bit of D × 4 is 2, then d = 3 or 8, because a = 2, so d = 8; 2bc8 × 4 = 8cb2, 100 bits do not carry thousand bits, so B = 0,1,2, because the last bit of C × 4 is even, D (8) ×
How to prove that a parallelogram is a centrosymmetric figure? How to prove that the intersection of two diagonals is the center of symmetry?
On the first floor, which class is your kindergarten? Let's wait until the kindergarten is finished.
That person is bullshit. Centrosymmetry means that you can return to the original position by rotating 180 degrees. So just draw it with a scale and prove it
If we know that the sum of the two right sides of a right triangle is equal to 8 and what are the two right sides, what is the maximum area of the right triangle?
Let the right side of a right triangle be x, then the other right side is 8-x. the area of a right triangle is s. according to the title, s = 12x (8-x) (0 < x < 8), formula, s = - 12 (x-4) 2 + 8; when x = 4, that is, when the two right sides are 4, the area of the triangle is the largest, and the largest area is 8
The side length of cube abcd-a1b1c1d1 is a, and the surface area and volume of triangular pyramid a-abd are calculated
A1bd is an equilateral triangle with the side length of root 2, so the surface area is easy to find, which is (3 + root 3) / 2 of square a
If a vertical line is drawn through a to a1bd, the vertical foot is on the center of a1bd. According to the relationship of internal triangles, the height can be calculated, and the root of a is 3 / 3. Then the formula is set, and the area is a ^ 3 / 6
The length of the lower part of a trapezoid is three times that of the upper part. Lengthen the upper part by eight centimeters to form a parallelogram with an area of 288 square centimeters. What is the area of the original trapezoid in square centimeters
Extending the upper bottom by 8 cm can form a parallelogram, and the upper bottom is three times of the lower bottom
Upper and bottom = 8 ÷ (3-1) = 4cm,
Bottom = 3 × 4 = 12 cm,
H = 288 △ 12 = 24cm
Trapezoid area = (4 + 12) × 24 △ 2 = 192 square centimeter
RELATED INFORMATIONS
- 1. A 2-meter-long cuboid wood has a cross-sectional area of 16 square decimeters. How many cubic meters is its volume? Determinant
- 2. Saw the 1.2 meter long cuboid wood into three sections, the surface area increased by 48 square decimeters, the original volume of the wood is______ ．
- 3. A square table is made of a table top and four legs. It is known that one cubic meter of wood can be used to make 50 tables or 300 legs. Now five cubic meters of wood, what should we do Cutting material, can make the table top and table leg just match?
- 4. A square table consists of a table top and four legs. It is known that one cubic meter of wood can be used for 50 tables or 300 legs (equations only) A square table consists of a table top and four legs. It is known that one cubic meter of wood can make 50 tables or 300 legs. Please help the carpenter to calculate how many square tables can be made with five cubic meters of wood The equation can be set up linear equation in two unknowns
- 5. Now you need to buy 1 cubic meter of wood. For example, 4 meters long, 0.08 meters wide, 0.05 meters high is less than 3 cubic meters For example, 4 meters long, 0.08 meters wide, 0.05 meters high is equal to less cubic? If you have, please teach me more carefully! Teach me how to calculate! Now I need it very much!
- 6. I want a unit of length under millimeter To be less than millimeter, there must be a progressive rate, for example: kilometer × 100 = meter × 10 = decimeter × 10 = centimeter
- 7. Find the physical order of magnitude The form of a few cubic meters of 10 tells me: the size of the electron cloud, asteroid belt stars (sun) planets The form of a few power seconds of 10 tells me: the time of a pulse, a day, a year, the life span of a person, the age of the earth, the age of the galaxy All of the above know that you can tell me 10 times
- 8. What is the rate of progress between kilometers and meters, and between meters and decimeters?
- 9. What is the rate of advance between kilometers and meters?
- 10. The kilogram and gram are weight units in grade two, right
- 11. Cylindrical wood, 150 cm long, cross-section diameter is 12 cm, if according to the ratio of 2:3 according to it into two sections, then the shorter section volume is how many cubic centimeters?
- 12. I'm going to buy a piece of wood, 5cm thick, 13cm wide and 4m long. How much is the cube?
- 13. It's 10 centimeters in diameter and 8 meters long
- 14. The diameter of a tree is 12cm, the height is 10m ~ how many cubic meters of wood can it produce~
- 15. A cuboid wood is 5.2 meters long. If it is sawn 10 cm short, its volume will be reduced by 1000 cubic centimeters. What is the original volume of this wood?
- 16. The surface area increases by 4 square meters after two cylinders are cut into 10 cm on one cylinder?
- 17. The length of a cylindrical wood is 4dm, and the bottom radius is 10cm. After cutting it into three sections, the surface area increases by () cm2? A.942 b.1256 c.1884
- 18. A cuboid wood is 3 meters long. Now, after sawing the wood into 4 sections, the surface area increases by 48 square decimeters. The volume of the cuboid wood is 3 meters______ Cubic decimeter
- 19. A section of cuboid wood is one meter long. If it is sawn two centimeters short, its volume will be reduced by 20 cubic centimeters. What is the original volume of this section of wood?
- 20. After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A.100 cubic centimeters After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A. 100 cc b.200 CC C. 10000 cm3 D.2 DM3