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When the side length of a square is tripled, the area increases by 114 square decimeters. What is the area of the original square?
eighteen
The sum of the edges of a cube is 48 cm. What is the surface area and volume of the cube?
A total of 12 edges, 48 △ 12 = 2, 2 × 2 = 4, a total of 6 faces, 4 × 6 = 24 square cm
Volume: 2 × 2 × 2 = 8 cc
On the drawing with a scale of 1:500, the side length of a square flowerbed is 4cm. How many square meters is the actual area of the flowerbed?
Why is the actual area: 20 * 20 = 400 square meters instead of side length * 4, that is, 20 * 4 = 80
Side length * 4 is the perimeter of a square, not its area
Area is side length * side length
On a drawing with a scale of 500:1, the diameter of a semicircular flowerbed measured is 4cm. Find out the actual floor area of the flowerbed
1:500！ It's not 500:1
Actual floor area = 500x4 = 2000cm2 = 20m2
RELATED INFORMATIONS
- 1. The scale of a plane diagram is 1:2000. The radius of a circular flower bed is 1.5cm long. How many square meters does it actually cover?
- 2. The diameter of a round flowerbed is 2cm on the drawing with the scale of 1:2000. What is the actual area of the round flowerbed?
- 3. If the side length of a square is doubled, its area will be doubled. How to calculate
- 4. After the area of a square becomes three times of the original, its side length becomes several times of the original
- 5. The square side length expands to the original n times, its area expands to the original several times
- 6. It is known that the area of a square is the square of X - 2aX + a (x is greater than 0, a is less than 0), and the algebraic expression of the side length of the square is obtained
- 7. If the side length of a square is a + 2 and the side length of the other square is a (a is greater than 0), what is the difference between the areas of the two squares?
- 8. The area of a square is four times that of the original. How many times is its edge? How many times is its area nine times that of the original? N times
- 9. A square vegetable field, expand the side length by 3 meters, increase the area by 39 square meters, how much is the original square area
- 10. The total area of the left figure is 1256 square centimeters. The overlapping area of the two rectangles is equal to one eighth of the area of the large rectangle and one sixth of the area of the small rectangle
- 11. What does it mean to enlarge the graph by 3:2? Hurry up
- 12. A rectangle, 6cm long and 3cm wide, enlarged by 5:1, the area of the figure is ()
- 13. A triangle with a base of 5cm and a height of 3cm is enlarged by 4:1, and the area of the figure is______ Square centimeter
- 14. The area of a trapezoid is 8.4 square centimeters, the height is 2.8 centimeters, the length of the bottom is three times that of the top, and the length of the bottom is ()
- 15. The area of a rectangle is 100 square centimeters. If the length is reduced by four times and the width is increased by four times, the rectangle will become a rectangle
- 16. The area of a square is 900 square meters. Draw it on a picture with an area of 36 square centimeters. Find the scale of the picture The area of a square is 900 square meters. Draw it on a picture with an area of 36 square centimeters. Find the scale of the picture
- 17. A rectangle is four times the width and 120 meters in circumference. How many square meters is the area of this rectangle?
- 18. If the length of a rectangle is reduced by 5 cm, the area will be reduced by 50 square cm. If the width is increased by 7 cm, the area will be increased by 28 square cm
- 19. A rectangle has an area of 378 square meters and a width of 9 meters. If the width is increased to 15 meters and the length remains unchanged, the expanded area will be 9 meters
- 20. The length of the rectangle is increased to 56 meters, but the width remains unchanged. What is the area after expansion? The original length is 28 meters, and the area is 252 square meters