There is a rectangle, 6.5cm long and 2cm wide. Cut it into six pieces and then put it together into a square. How do you spell it? You need graphics,

The figure can't be inserted. 6.5 * 2 = 13, the side length is root 13, and the diagonal of the 2 * 3 rectangle is root 13. Divide the rectangle into two 2 * 3 rectangles, and then divide it into four right triangles. The remaining rectangles are bisected. The shape of the square is the emblem of the International Congress of mathematicians, which is also a string diagram

If two squares with 5 sides are combined into a rectangle, what is the area of the shadow in the figure

As shown in the figure, it is composed of two identical squares and three rectangles. Its perimeter is 104cm, and the length of each rectangle is 1.5 times of its width
What is the circumference of a small rectangle in cm?

tu?

After a polygon cuts off an angle, the sum of the inner angles of the new polygon is 1800 degrees, then the number of sides of the original polygon is 1800 degrees______ ．

Let the number of sides of a polygon cut off an angle be n, then (n-2) · 180 ° = 1800 ° and the solution is n = 12, ∵ after cutting off an angle, the number of sides can be increased by 1, unchanged and decreased by 1, ∵ the number of sides of the original polygon is 11 or 12 or 13. So the answer is: 11 or 12 or 13

Given that the side length of regular triangle ABC is 6, find its inscribed circle and circumscribed circle area

The side length of an equilateral triangle ABC is 6
So the height is h = √ (6 ^ 2-3 ^ 2) = 3 √ 3
So the radius of the inscribed circle is r = H / 3 = √ 3
The radius of circumcircle is r = 2H / 3 = 2 √ 3
So its inscribed circle is s = π R & # 178; = 3 π
The area of circumcircle is s = π R & # 178; = 12 π
If you don't understand, please ask, I wish you a happy study!

In plane geometry, there are the following conclusions: if the area of inscribed circle of regular triangle ABC is S1 and the area of circumscribed circle is S2, then S1S2 = 14, and similar conclusions can be obtained by extending to space; if the volume of inscribed sphere of regular tetrahedron p-abc is V1 and the volume of circumscribed sphere is V2, then V1V2 = 14___ ．

From the plane figure to the space figure, from the two-dimensional figure to the three-dimensional figure, we can draw the following conclusion: the radius ratio of the circumscribed sphere and the inscribed sphere of the regular tetrahedron is 3:1, so the volume ratio of the inscribed sphere of the regular tetrahedron p-abc is V1, and the volume ratio of the circumscribed sphere is V2 = (13) 3 = 127

In a 1:800 drawing, the area of a square vegetable field is 10 square centimeters. How many square meters is the actual area of this vegetable field

10 × (800 ^ 2) = 6400000 (square centimeter)
=640 (M2)

1. The range of an automatic rotary sprinkler irrigation device on the park grassland is 10 meters. How many square meters can it spray irrigation area?
2. The diameter of a fountain is 18 meters. How many meters does it take to walk around the fountain? How many square meters does the fountain cover?
3. Grandfather Li fenced a semicircular vegetable field against the wall for improved seed cultivation. The fence is 12.56 meters long. How many square meters is the vegetable field area?
4. The minute hand of a watch is 1.6cm long. What is the area that the minute hand goes through when it rotates for one circle?
(please answer quickly. I'm in a hurry. I've given all my points.)
Just a few answers.

1.3.14 * 10 * 10 = 314 square meters
2. The diameter is 18 meters and the radius is 9 meters
3.14 * 18 = 56.52m 3.14 * 9 * 9 = 254.34m2
3.12.56 * 2 / 3.14 = 8m, 8m is the diameter and radius is 4m
3.14 * 4 * 4 / 2 = 25.12 square meters
4.3.14 * 1.6 * 1.6 = 8.0384 square centimeter
The first few answers are wrong. If you don't believe me, you can count them. This will only teach the bad guys

In a 1 / 1000 drawing, a square has an area of 16 square centimeters
Its actual area is () square meters

16 sq cm = 0.0016 sq m
0016 × 1000 & # 178; = 1600 (M2)
A: its actual area is 1600 square meters

Fill in the blanks: in the drawing with scale of 1 / 1000, the side length of a square is 14 cm, and its actual area is [] square meters

In the drawing of 1 / 1000 scale, the side length of a square is 14 cm, and its actual area is 19600 square meters
In the top right corner of my answer, click comment, and then you can choose satisfied, the problem has been solved perfectly

There is a rectangle, 6.5cm long and 2cm wide. Cut it into six pieces and then put it together into a square. How do you spell it? You need graphics,