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The circumference of a rectangle is 26 cm, its length is 8 cm, and its area is 8 cm
Width = 26 △ 2-8 = 5
Area = 5 × 8 = 40 square centimeter
As shown in the figure, the area of square ABCD is 25, and the area of rhombic pqcb is 20
In RT △ QEC, EQ = qc2-ec2 = 3; PE = pq-eq = 2; s shadow = s Square abcd-s trapezoid
The area of rectangle and circle is equal, the width of rectangle is equal to the radius of circle, the circumference of circle is 20 cm, and the distance from the center of circle to rectangle is 8 cm
A circle and a rectangle move parallel to the left along a straight line at the same time. The speed of the circle and the rectangle is 5cm and 3cm per second respectively. Then, after they move for 4 seconds at the same time, what is the perimeter of the closed figure with no overlap between the inside of the rectangle and the circle?
The distance between a circle and a rectangle is 8 cm, and the velocity difference between them is 2 cm / s. after moving to the right for 4 seconds, the distance between them becomes 0, so there is no overlap between them. Then the closed figure is the circumference of a rectangle. As long as the circumference of a rectangle is calculated, it can be obtained from the circumference of a circle of 20 cm, and the width of a rectangle is equal to the radius of a circle
RELATED INFORMATIONS
- 1. The circumference of a rectangle is equal to that of a circle. The length of a rectangle is 4.85cm, which is 1.85cm longer than the width. What is the area of the circle in square centimeter?
- 2. The circumference of a rectangle is 40 cm, the length is 12 cm, and the width is how many cm?
- 3. The circumference of a rectangle is cm, if the length of the rectangle is am (AM)
- 4. The perimeter of a rectangle is 64cm, the width is 3 / 5 of the length. What is the area of the rectangle in square centimeter
- 5. The circumference of a rectangle is 10 cm, and the ratio of length to width is 3:2. How many square centimeters is its area?
- 6. The circumference of a rectangle is 12. Let its length be y and width be X. try to find the functional relationship between Y and X and write out the value range of the independent variable
- 7. The circumference of a rectangle is 40cm. If the width is 6cm and the length is xcm, the equation ()
- 8. A square with a side length of 5cm has a circumference of () cm and an area of () square cm. A rectangle has a circumference of 25.12cm and a width of 6cm The area is () square centimeters The area of a triangle is 18 square centimeters, and the area of a parallelogram with the same base and height is () square centimeters A right triangle, three sides are 6 cm, 8 cm, 10 cm. The triangle area is () square cm, the height on the hypotenuse is () cm
- 9. If the area between the two rectangles is 1400 square centimeters, calculate the perimeter of the small rectangle
- 10. Divide a circle into several small sectors, and then form an approximate rectangle. The circumference of the rectangle is 24.84 cm, and the area of the circle is () square cm A. 56.52B. 1413C. 28.26D. 2826
- 11. As shown in the figure, a square is divided into three identical rectangles. If the perimeter of one of the rectangles is 16 cm, then the perimeter of the square is 16 cm______ Cm
- 12. A square is divided into five equal rectangles, each with a circumference of 60 cm and a square with a circumference of () cm A. 300B. 200C. 100
- 13. It is known that the perimeter of a large rectangle is 30 cm, and the shadow part is a rectangle. How about the length and width of a large square?
- 14. As shown in the figure, in rectangular ABCD, ∠ AED = ∠ BEC = 30 ° ad = 1m, try to estimate the length of de + EC + AE. (the error is less than 1m) For the specific process, the figure is about ABCD is a rectangle, divided into three triangles, AB is the bottom edge, e is the middle point of ab
- 15. In known trapezoidal ABCD, ad is parallel to BC (AD is less than BC), m and N are two waist AB, the midpoint of CD, me is parallel to an, BC intersects e, am = ne is proved
- 16. In known ladder ABCD, AD / / BC (AD
- 17. The diagonal lines AC and BD of parallelogram ABCD intersect at point O, and intersect with AB and CD respectively, and then verify with points E and f; OE = of
- 18. In the isosceles trapezoid ABCD, ad ∥ BC, AB is equal to DC, AC and BD intersect at the point O, ∠ BOC is equal to 90 ° and BD = 10?
- 19. The base angle of a right angle trapezoid is 45 degrees, the top is 3cm, and the area is 20cm
- 20. It is known that the bottom of a right angled trapezoid is 30 cm and its height is 12 cm. Divide it into a rectangle and a triangle. The area of the triangle is 72 square cm. What is the area of the trapezoid?