All the formulas for area?

Square s area a side length area = side length × side length s = a × a 2, cube A: edge length surface area = edge length × edge length × 6, s surface = a × a × 6 3, rectangle s area a side length area = length × width s = AB 4, cuboid s: Area A: length B: width H: height (1) surface area

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1. Can you tell me all about the area formula
2. Calculation formula of underground building area There is a project in Longling County, Yunnan Province. The known land area is 8 mu, the building density is 40%, the aboveground building area is 6400m2, the plot ratio is 1.2, and the green space rate is 35%. It is a multi-storey 3F. How to calculate the underground building area in the investment estimation?
3. Do you know how to calculate the floor area by floor area ratio? Please provide a formula! Plot ratio = building area △ floor area Building area = floor area × plot ratio Is this company right?
4. The teaching building covers an area of 660 square meters, about 3 / 40 of the total area of the campus. What is the total area of the campus
5. What is the area of gardens and famous buildings in China Please let me know if you know ha-ha Ha ha ha
6. A playground runway is a rectangle in the middle, 110 meters long and 50 meters wide. There are six runways, 1.2 meters each. How to find the area
7. How big is the playground in junior high school
8. Don't tell me the subject is not clear In a mountainous area, there are 25 kinds of peach trees, 27 kinds of pear trees and the rest kinds of apple trees. What is the proportion of apple trees in the total area? If the area of each fruit tree is equal, how much less peach trees should be planted?
9. 3 / 4 of an orchard is used to plant fruit trees, among which apple trees account for 1 / 5 of the total area, pear trees account for 1 / 6 of the total area, the rest are peach trees, and peach trees account for a few percent Please answer as soon as possible
10. Two fifths of an orchard are pear trees, two fifths are peach trees, and the rest are apple trees? If the planting area of each fruit tree is equal, what percentage of the total area of pear trees should be reduced?
11. The area of artificial leveling site is calculated by adding 2m to each side of the outer wall sideline The area of artificial leveling site is calculated by adding 2m to each side of the outer wall sideline. How can the formula s = s bottom + 2 × l outside + 16 be calculated? There is also excavation and sloping foundation pit How can the formula v = (a + 2C + KH) * (B + 2C + KH) * H + 1 / 3K * k * h * h * H be calculated A: Length of foundation cushion B: Width of foundation cushion C: Working face width K: Grading factor H: Earth excavation depth
12. How much is the building area multiplied by the actual area of the external wall
13. How to calculate the external wall area of the building?
14. How to calculate the area of building exterior wall Given the building area, how to calculate the external wall area and the internal wall area
15. Do you calculate the building area of exterior wall steps and corridors?
16. How to calculate the external wall area
17. The building area is 80 square meters. How much is the practical area?
18. We know that the total area is 9 square meters, distributed according to the ratio of 4:3. How many meters are the length and width, and how to calculate with the formula?
19. Know that the actual area of the house is 136 square meters, if 70% of the housing rate to calculate the building area should be how much? This formula is how to calculate
20. The total area of the house is 195 square meters, divided into three rooms, the width of each room is 4.2. How much is the length of each room? How much is the area of a single room? Thank you