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In the quadrilateral ABCD, ab ∥ CD, AC bisects ⊥ DAB, ad = BC, AC ⊥ BC, ⊥ DAB = ⊥ B, ab = 4cm
It is an isosceles trapezoid with other three sides of 2cm and perimeter of 10cm
Given that the volume of an inscribed cube of a sphere is 8, what is the volume of the sphere
The volume of inscribed cube is 8
So the side length of the cube is 2
The opposite vertex angle is the diameter of the circle
The diagonal of each square of the cube is 2
The diameter of the circle is 2 and 3
The radius is root 3
Sphere volume v = 4 π R & # 179 / 3
V = 4 radical 3 π
If the length of a cuboid is increased by 5cm, the surface area of the cuboid will be increased by 80cm 2. Calculate the surface area of the original cuboid
Why are my formulas different+_+
The increased surface area is the area of four rectangles whose length is 5cm and width is the side length of the square cross section of the original cuboid. The area of such a rectangle is 80 ／ 4 = 20 square centimeter. The length of the rectangle is 5cm and the width is 20 ／ 5 = 4cm. Thus, the square cross section area of the original cuboid is 4 × 4
It is known that the length of a cuboid is 4cm, the width is 3cm, and the height is 5cm
The length, width and height of the cuboid are 4cm, 3cm and 5cm respectively. (1) the sum of the edge lengths of the cuboid is 4 × (4 + 3 + 5) = 48CM, so the sum of all the edge lengths of the cuboid is 48CM. (2) the surface area is 2 × (4 × 3 + 4 × 5 + 3 × 5) = 2 × 47 = 94cm2, so the surface area of the cuboid is 94cm2
RELATED INFORMATIONS
- 1. A cuboid of 7cm in length, 6cm in width and 5cm in height is cut into two equal cuboids so that the sum of the surface areas of the two cuboids is the largest What's the maximum? What's the minimum? (to be comprehensive)
- 2. Cut a cuboid of 7cm in length, 6cm in width and 5cm in height into two cuboids so that the two cuboids have the largest surface area. What is the sum of the surface products of the two cuboids
- 3. It is known that there is a square side of a cuboid paperless box, and the length of two edges is 4cm and 5cm respectively. The surface area and volume of the box are calculated
- 4. 1. The cuboid carton without cover has a square surface and the length of two edges is 4cm and 5cm respectively. Calculate the surface area outside the carton Six cuboids with 10 cm long edges are stacked together to form a cuboid, and the surface area of the cuboid is calculated 2. Paint the six sides of a cuboid which is 4cm long, 3cm wide and 6cm high with blue, and then saw the cuboid to get a small cube whose edge length is 1cm ① How many cubes are there with three faces painted blue ② How many cubes are there with two sides painted blue ③ How many small blue cubes are there on a surface
- 5. As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
- 6. As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
- 7. A cuboid is 10cm long, 7cm wide and 5cm high. The sum of its edges is (), the surface area is (), and the volume is ()
- 8. The perimeter of a rectangle is 50cm. The length of the rectangle is 50% more than the width. How about the area of the rectangle? Be sure to say why? Step by step
- 9. If the two sides of a triangle are 5 cm and 8 cm respectively, the length of the third side may be () cm A. 12 cm B. 13 cm C. 14 cm
- 10. The perimeter of the triangle is 22cm. The first side is known to be (a + 2b) cm, and the second side is (B + 2) cm longer than the first side. The third side of the triangle is calculated
- 11. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
- 12. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
- 13. In triangle ABC, angle B = angle c = 36 degrees, angle ade = angle ade = 72 degrees, then the number of isosceles triangles in the graph is?
- 14. As shown in the figure, ▱ the diagonal lines AC and BD of ABCD intersect at point O, point E is the midpoint of CD, and the perimeter of △ abd is 16cm, then the perimeter of △ DOE is______ cm．
- 15. As shown in the right figure, in the parallelogram ABCD, we know that ad = 8 and perimeter is equal to 24, then we find the lengths of the other three sides
- 16. If the perimeter of parallelogram ABCD is 32,5ab = 3bC, the value range of diagonal AC is ()
- 17. A circle with a circumference of 6.28dm can be divided into several equal parts to form a parallelogram. The bottom of the parallelogram is equivalent to______ Yes______ The height of a parallelogram is equal to______ Yes______ cm．
- 18. It is known that the perimeter of a parallelogram is 20 cm. A diagonal divides it into two triangles with a perimeter of 16 cm. How many cm is the diagonal?
- 19. If the perimeter of parallelogram is 48mm and the diagonal intersects o, the perimeter of triangle AOB is 4mm longer than that of triangle BOC, then the lengths of AB and BC are equal to?
- 20. The diagonals AC and BD of parallelogram ABCD intersect at O, e and F, which are two points on DB, and de = BF I'm sorry to trouble you to copy it,