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In a rectangle 18 cm long and 8 cm wide, cut out the largest semicircle, and the area of the semicircle is______ Square centimeter
The diameter of the semicircle is 8 × 2 = 16 cm, the radius is 8 cm, the area of the semicircle is 3.14 × 82 △ 2 = 200.96 △ 2, = 100.48 (square centimeter); answer: the area of the semicircle is 100.48 square centimeter. So the answer is: 100.48
In a rectangle 18 cm long and 8 cm wide, cut out the largest semicircle, and the area of the semicircle is______ Square centimeter
The diameter of the semicircle is 8 × 2 = 16 cm, the radius is 8 cm, the area of the semicircle is 3.14 × 82 △ 2 = 200.96 △ 2, = 100.48 (square centimeter); answer: the area of the semicircle is 100.48 square centimeter. So the answer is: 100.48
A rectangle is 8 cm long and 4.56 cm wide. What is the area of a circle equal to the circumference of the rectangle?
2 × (8 + 4.56) = 25.12 (CM), 25.12 ／ 3.14 ／ 2 = 4 (CM), 3.14 × 42 = 3.14 × 16 = 50.24 (square cm). A: the area of a circle equal to the circumference of this rectangle is 50.24 square cm
RELATED INFORMATIONS
- 1. A rectangle is 8 cm long and 4.56 cm wide. What is the area of a circle equal to the circumference of the rectangle?
- 2. The ratio of the length to the width of a rectangle is 14:5. If the length is reduced by 13 cm and the width is increased by 13 cm, the area will be increased by 182 square cm. What is the area of the original rectangle?
- 3. Increase the length and width of a rectangle by 1 / 4. The area ratio of the current rectangle to the original rectangle is ()
- 4. The ratio of length to width of a rectangle is 7:5. If the width is increased by 14 cm, the rectangle will become a square. The area of the original rectangle is___ Square centimeter
- 5. Use 105 squares of the same size to make a rectangle, with______ There are two different spellings
- 6. It is known that the circumference of the rectangle is 22 decimeters and the length is 7.6 decimeters. Find the area of the rectangle Need "solution" and "answer" (solution of equation)
- 7. What is the circumference of a square with a side length of 6 cm______ If the perimeter of another rectangle with a length of 8 cm is equal to the perimeter of this square, then the width of the rectangle is______ Cm
- 8. There is a piece of paper with a length of 6.5cm and a width of 2cm, as shown in the figure. Please divide it into 6 pieces, and then put it together into a square. (requirement: draw the dividing line in the figure, and then draw the square and mark the corresponding data)
- 9. Five small squares with a side length of 1 make a big square
- 10. As shown in Figure 1, a rectangle (M > n) with length m and width n is cut along the dotted line and spliced into Figure 2 to form a large square after removing a small square from a corner. Then the side length of the removed small square (expressed by the formula containing m, n) is______ ．
- 11. Draw the largest circle on a rectangular paper 12 cm long and 8 cm wide. The radius of the circle is () cm and the area of the circle is () square cm
- 12. The area of a rectangular vegetable plot is 376.8 square meters, 24 meters in length, how many meters in width and how many meters in circumference?
- 13. The perimeter of a rectangular lawn is 36 meters, and the known length is twice the width. How many square meters is the area of this rectangular lawn
- 14. A rectangle is four times the width and 120 meters in circumference. How many square meters is the area of this rectangle?
- 15. If the length and width of a rectangle increase by 4 meters, the area will increase by 88 square meters. What is the perimeter of the original rectangle?
- 16. Use four rectangle with circumference of 28cm to form a big rectangle, and find the perimeter of the big rectangle
- 17. The perimeter of a rectangular vegetable field is 280 meters. The ratio of length to width is 4:3. What are the length and width of this vegetable field? Give a direct solution to the proportion formula
- 18. There is a rectangular stadium. If its length and width are increased by 6 meters and its area is increased by 1236 bungalows meters, the original perimeter is
- 19. There is a rectangular sports ground. If its length and width are increased by 6 meters, the area will be increased by 1236 meters. What is the perimeter of the original sports ground If the equation, please say the practice. Kneel ah!
- 20. Use three square with 13 cm circumference to form a rectangle, and find the circumference of the rectangle