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As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
Suppose the side length of the square is xcm, then according to the meaning of the question: 4x = 5 (x-4), the solution is: x = 20. Then 4x = 80 (cm2), 20 × 20 = 400 (cm2). Answer: the area of each strip is 80cm2, the area of the original square is 400cm2
As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
Suppose the side length of the square is xcm, then according to the meaning of the question: 4x = 5 (x-4), the solution is: x = 20. Then 4x = 80 (cm2), 20 × 20 = 400 (cm2). Answer: the area of each strip is 80cm2, the area of the original square is 400cm2
As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
Suppose the side length of the square is xcm, then according to the meaning of the question: 4x = 5 (x-4), the solution is: x = 20. Then 4x = 80 (cm2), 20 × 20 = 400 (cm2). Answer: the area of each strip is 80cm2, the area of the original square is 400cm2
As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
Suppose the side length of the square is xcm, then according to the meaning of the question: 4x = 5 (x-4), the solution is: x = 20. Then 4x = 80 (cm2), 20 × 20 = 400 (cm2). Answer: the area of each strip is 80cm2, the area of the original square is 400cm2
RELATED INFORMATIONS
- 1. As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
- 2. A cuboid is 10cm long, 7cm wide and 5cm high. The sum of its edges is (), the surface area is (), and the volume is ()
- 3. The perimeter of a rectangle is 50cm. The length of the rectangle is 50% more than the width. How about the area of the rectangle? Be sure to say why? Step by step
- 4. If the two sides of a triangle are 5 cm and 8 cm respectively, the length of the third side may be () cm A. 12 cm B. 13 cm C. 14 cm
- 5. The perimeter of the triangle is 22cm. The first side is known to be (a + 2b) cm, and the second side is (B + 2) cm longer than the first side. The third side of the triangle is calculated
- 6. Pythagorean theorem: the perimeter of an isosceles triangle is sixteen, and the height of its bottom is four
- 7. The length of the base of an isosceles triangle is 5cm, and the middle line of a waist is divided into two parts. The difference between the two parts is 2cm A. 7cm b.3cm c.7cmor3cm D
- 8. Draw an isosceles trapezoid so that its top and bottom edges are 5cm and 11cm in length and 4cm in height, and calculate the perimeter of the isosceles trapezoid Just started school not long, geometry, do not make what square root what thing Pythagorean theorem has not been learned yet
- 9. The circumference of isosceles triangle is 28.5cm, whose height is 6.4cm, and what is its area
- 10. How to find the bottom of an isosceles triangle
- 11. 1. The cuboid carton without cover has a square surface and the length of two edges is 4cm and 5cm respectively. Calculate the surface area outside the carton Six cuboids with 10 cm long edges are stacked together to form a cuboid, and the surface area of the cuboid is calculated 2. Paint the six sides of a cuboid which is 4cm long, 3cm wide and 6cm high with blue, and then saw the cuboid to get a small cube whose edge length is 1cm ① How many cubes are there with three faces painted blue ② How many cubes are there with two sides painted blue ③ How many small blue cubes are there on a surface
- 12. It is known that there is a square side of a cuboid paperless box, and the length of two edges is 4cm and 5cm respectively. The surface area and volume of the box are calculated
- 13. Cut a cuboid of 7cm in length, 6cm in width and 5cm in height into two cuboids so that the two cuboids have the largest surface area. What is the sum of the surface products of the two cuboids
- 14. A cuboid of 7cm in length, 6cm in width and 5cm in height is cut into two equal cuboids so that the sum of the surface areas of the two cuboids is the largest What's the maximum? What's the minimum? (to be comprehensive)
- 15. In the quadrilateral ABCD, ab ∥ CD, AC bisects ⊥ DAB, ad = BC, AC ⊥ BC, ⊥ DAB = ⊥ B, ab = 4cm
- 16. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
- 17. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
- 18. In triangle ABC, angle B = angle c = 36 degrees, angle ade = angle ade = 72 degrees, then the number of isosceles triangles in the graph is?
- 19. As shown in the figure, ▱ the diagonal lines AC and BD of ABCD intersect at point O, point E is the midpoint of CD, and the perimeter of △ abd is 16cm, then the perimeter of △ DOE is______ cm．
- 20. As shown in the right figure, in the parallelogram ABCD, we know that ad = 8 and perimeter is equal to 24, then we find the lengths of the other three sides