![](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>)
Build a 2-meter-wide path around a 10 meter diameter circular flower bed. What's the area of the path?
10 △ 2 = 5m
5 + 2 = 7M
3.14 × 7-178; - 3.14 × 5-178; = 75.36 square meters
A: the area is 75.36 square meters
It is necessary to build a 2-meter-wide circular path around a circular flower garden with a diameter of 18 meters. What is the area of the circular path?
3.14 × (18 ／ 2 + 2) 2-3.14 × (18 ／ 2) 2 = 3.14 × 112-3.14 × 92 = 3.14 × 121-3.14 × 81 = 379.94-254.34 = 125.6 square meters; a: the area of this circular road is 125.6 square meters
A round flower bed, 10 meters in diameter, along the outside of the flower bed paved a 3 meter wide path, the path area is how many square meters?
10 △ 2 = 5m
5 + 3 = 8M
3,14 × 8-178; - 3.14 × 5-178; = 122.46 square meters
The radius of a round flower bed is 6 meters. A 1.5 meter wide path should be built around the flower bed. What is the area of the path?
6 + 1.5 = 7.5 (m)
3.14×7.5×7.5-3.14×6×6
=3.14×（7.5×7.5-6×6）
=3.14×20.25
=63.585 (M2)
The radius of a flower bed is 8 meters, and there is a 2 meter wide circular path around it. How many square meters is the area of the path
Area of path = 3.14 × (8 + 2) - 3.14 × 8 = 31.4-25.12 = 6.28 square meters
The area of the path is 6.28 square meters
Build a 2-meter-wide path around a circular flower bed with a radius of 5 meters. How many square meters is the area of the path
Until 18:38
Area = (5 + 2) × (5 + 2) × 3.14-5 × 5 × 3.14 = 75.36 square meters
There is a round flower bed with a diameter of 20 meters in the park
What is the area of the circular path? What is the area of the path?
To find the area of a circular path is actually to find the area of a circular ring
Radius of small circle = 20 △ 2 = 10m
Big circle radius = 10 + 2 = 12m
Road area
=3.14×（12²-10²）
=3.14×44
=138.16 square meters
Build a 1 meter wide circular path around a 4 meter diameter circular flower bed. How many square meters is the area of the path?
hurry up!
Build a 1 meter wide circular path around a 4 meter diameter circular flower bed. How many square meters is the area of the path?
Inner radius 4 △ 2 = 2m
Outer radius 2 + 1 = 3M
Area 3.14 × (3 × 3-2 × 2)
=3.14×5
=15.7 square meters
Mulan primary school built a circular flower bed, 8 meters in diameter. Around the flower bed, build a 1 meter wide circular path, find the area of the path
What is the answer
8 / 2 = 4 4 + 1 = 5 5 * 5 * 3.14 = area of circular flower bed + circular path
4 * 4 * 3.14 = flower bed area
Area of circular flower bed + circular path area of flower bed = area of circular path
The perimeter of a round flower bed is 15.7 meters, and a 0.4 wide circular path is paved around the flower bed. How many square meters is the area of this path?
Just answer me!
The radius of flower bed is 15.7 / (2 * 3.14) = 2.5m
The area of the path is the area of the outer circle, and the radius of the circle is 2.5 + 0.4 = 2.9 meters
So the area of the path is 3.24 * (2.9 ^ 2-2.5 ^ 2) = 6.7824 square meters
RELATED INFORMATIONS
- 1. The perimeter of a round flower bed is 15.7 meters, and a 0.4 meter wide circular runway is paved around it. What is the area of the path?
- 2. Around a round pool with a diameter of 10 meters, build a stone road with a width of 1 meter. What is the area of this stone road?
- 3. There is a round skating rink in the park. Its perimeter is 502.4 meters. A 2-meter-wide path is paved around the rink. How many square meters is the area of the path?
- 4. A circular flower bed with a diameter of 5 meters is known. A 1 meter wide path is paved around it. How many square meters is the area of the path?
- 5. The diameter of the street garden is 6 meters. Now we plan to build a 2 meter wide path around the garden. How many square meters is the area of this path?
- 6. The sum of the top and bottom of a trapezoidal orchard is 160 meters, and its height is 45 meters. The area of this orchard is 160 meters______ If you plant a fruit tree for every 8 square meters, the orchard can grow fruit trees______ A tree
- 7. A dam is 20 meters long with trapezoidal cross section and 36 square meters in area. What is the volume of the dam?
- 8. The cross-sectional area of the reservoir dam is trapezoidal, angle B is equal to 30 degrees, angle c is equal to 45 degrees, and the dam crest ad = 6m, CD = 20m. Then, what are the length of the dam bottom BC and the cross-sectional area? (keep the integral part) [no figure]
- 9. Trapezoid area is 60 square centimeter, height 5 centimeter, bottom 8 centimeter, seek bottom. Equation () - x = 0.8, X ÷ () = 0.02 (so that the solutions of the equation are all 0.1)
- 10. Uncle Li uses a wall, as shown in the figure below, with 20 meters long rope, surrounded into a trapezoid, the trapezoid area is how many square meters?
- 11. Build a 1-meter-wide stone road around a pool with a diameter of 8 meters. How many square meters is the area of this stone road?
- 12. A 2m wide path is built on the periphery of a circular flower bed with a diameter of 18m. The area of the path is
- 13. OO in trapezoidal ABCD, AB / / CD, diagonal AC and BD intersect at O, the area of triangle AOB is 4, the area of triangle cod is 9, find the quadrilateral of ABCD
- 14. If the upper and bottom of a trapezoid is increased by 5 cm, it becomes a parallelogram. If the upper and bottom are reduced by 7 cm, it becomes a triangle, and the area is reduced by 21 square cm, Original area of trapezoid
- 15. A trapezoid, after its bottom is shortened by 5 cm, becomes a square, and the area is reduced by 20 square cm. What is the area of the original trapezoid?
- 16. The area of triangles bisected by the center line of each side of a triangle is equal, and the ratio is 2:1. How to prove that we need the help of the great God
- 17. Area of parallelogram=______ The letters are______ . area of triangle=______ The letters are______ ．
- 18. A trapezoid has an upper bottom of 5 cm, a lower bottom of 8.2 cm and a height of 4.5 cm. If the largest triangle is cut out of the trapezoid, how many square centimeters is the remaining area?
- 19. For a trapezoid, if the upper bottom is reduced by 2.5 cm, it becomes a triangle, and the area is reduced by 8.5 square cm compared with the original trapezoid; if the lower bottom is reduced by 4 cm For a trapezoid, if the upper bottom is reduced by 2.5 cm, it becomes a triangle, and the area is reduced by 8.5 square cm compared with the original trapezoid; if the lower bottom is reduced by 4 cm, it becomes a parallel polygon, and the area of the original trapezoid is calculated
- 20. A trapezoid will become a triangle if its upper bottom is reduced by 4cm, and its area will be reduced by 8cm square compared with the original trapezoid. If its upper bottom is increased by 4cm, it will become a parallelogram. What is the area of the original trapezoid?