![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
If the perimeter of a square is 2bcm and the length of a rectangle equal to its perimeter is ACM, what is the width of the rectangle?
The width is B-A cm
The equator of the earth is a big circle, and the joint of table tennis is a small circle. If the radii of the two circles are increased by 1 meter, then the increased lengths of the two circles are the same
Wrong, because their original radii are different
If the circumference of the earth increases by 1 meter, how much will the radius increase?
0.5/3.14
RELATED INFORMATIONS
- 1. The radius of the earth is 6370 km, and the radius of table tennis is about 2 cm. Using scientific notation, the radius of table tennis is a fraction of the radius of the earth-- Results two significant numbers are retained
- 2. Find the perimeter of inscribed regular decagon with radius of 10cm
- 3. Proof: table tennis is as big as the earth
- 4. Is the shape of the earth like an apple or a ping-pong ball
- 5. If the length of a rectangle increases by 4cm and the width decreases by 1cm, the area remains unchanged; if the length decreases by 2cm and the width increases by 1cm, the area remains unchanged, the area of the rectangle is______ ．
- 6. If the length of a rectangle increases by 4cm and the width decreases by 1cm, the area remains unchanged; if the length decreases by 2cm and the width increases by 1cm, the area remains unchanged, the area of the rectangle is______ ．
- 7. If a + B = 7cm and A-B = 3cm, find the difference of their surface areas
- 8. The length, width and height of a cuboid are ACM, BCM and HCM respectively. If the height is increased by three centimeters, how much more is the volume of the new cuboid than that of the original cuboid? It's written in letters. It's written in formulas
- 9. The length, width and height of a cuboid are ACM, BCM and HCM respectively. If the height is increased by 2cm, its volume will be increased by () cubic centimeter. The formula divides 35 into the sum of two prime numbers, and there are () kinds of methods. The square building block with the volume of 37 cubic centimeter occupies () area on the table
- 10. If the area of a diamond is 12 cm2 and the length of its two diagonals is ACM and BCM respectively, then the functional relationship between a and B is a = 1___ The graph of this function is at___ Quadrant
- 11. It is known that the base of an isosceles triangle BC = 8cm and the waist AB = 10cm, then the height of the AC side is? But the answer is different,
- 12. The circumference of an isosceles trapezoid is 50cm, the waist and height are 10cm and 8cm respectively. What is the area of this trapezoid?
- 13. The circumference of an isosceles triangle is 40cm, the length of a waist is 12cm, and the height of the bottom is 10cm. What is the area of this triangle?
- 14. If AB = 15cm, BC = 5cm, the length of AC is ()
- 15. In RT △ ABC, AC = 3cm, BC = 4cm, ab = 5cm, take the line segment of the three sides as the axis of rotation respectively, and get the relationship of the three geometric bodies after one revolution?
- 16. As shown in the figure BD = 2cm, AC = 20cm, rotate triangle ABC around AC axis to get a figure, and calculate the volume of the figure
- 17. The length of the two right sides of a right triangle is 3cm and 4cm respectively. If the right triangle is rotated around the hypotenuse, the volume of the rotating body is
- 18. The following is a right triangle, with ab as the axis to rotate around it for a circle, get a three-dimensional figure, its volume is how many cubic centimeters?
- 19. If the length of the hypotenuse of a right triangle is 10 cm and the radius of its inscribed circle is 2 cm, then its perimeter is?
- 20. Given a right triangle, its circumscribed circle radius = 6, inscribed circle radius = 2, find the perimeter of the triangle