The 13 steps of the geometric sketchboard windmill are not written wrongly

The two lines are different, and the label of the dot automatically becomes the original label and a " after the first move'", after the second move, it will automatically become the original label and two".'", i.e. ".''”。It's almost the same.

It's very simple, the operation steps are as follows: first you draw a circle, then take a point on the circle, connect the center of the circle and the points on the circle, construct the midpoint of the line segment between the center of the circle and the point on the circle, then construct the center of the circle, the point on the circle, and the arc where the midpoint is located, fill the inside of the arc, and then continue to construct several arcs, and then set the animation button of the point on the circle, and that's it. Please see the figure below for the detailed tutorial**, you can go to see the detailed tutorial.

1.Draw a circle and take any point on the circle to connect the center of the circle.

2.Then the mountain burns on top to make the shape of the windmill you want.

3.Double-click the center of the circle to mark it as the center, then select the windmill in the head of the sail and click "Rotate OK". As for the angle, the number of times depends on different requirements.

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Make a moving windmill with a geometric sketchpad.

The specific operation steps are as follows: (The content tutorial is derived from the Chinese official website of Geometry Sketchpad).

1.Draw a circle, the center of the circle is O, take a point A on the circle, construct the line segment OA and execute the "Construction"-"Midpoint" command to make the OA midpoint, as shown in the following figure.

2.Select the middle point, point A, and point O of OA in order, run the "Construction"-"Arc on Circle" command to construct the arc, select the arc and execute the "Construction"-"Arc Inside"-"Sector Inside" command to fill the inside of the arc with color, as shown in the following figure.

3.Double-click the point O, mark it as the center of rotation, select point A and the inside of the arc to execute the "Transform"-"Rotate" command, the rotation parameter is "Fixed angle 90 degrees", the effect is shown in the figure below.

4.Repeat the above rotation operation three times, and finally get the windmill shown in the figure below.

5.Select point a, execute the "" - operation button " - "animation" command, set the animation direction to clockwise, the speed to fast or the point "other set your own speed". ”

6.Hide the circles and dots in the workspace and adjust the position of the button to complete the operation of making a windmill.

The above tutorial explains in detail how to make a moving windmill using a geometric sketchpad, follow the steps above, I believe you can also make a moving windmill.

Prepare a square piece of paper, fold the corners in half, and cut the diagonal to about the center, and you will have four triangles, and you will have four triangles, and you will have the corners of the triangle in the same direction in the center, and then you can set it up.

Use the parametric equation to set the dynamic parameters, construct the points, you need to use the parameters to construct the four points of the uniform division on the circumference, and use your own brain to think about it, which is quite simple, and you don't know how to communicate.

Your problem is a bit general, use Draw a circle, draw a moving point on the circle, draw an arc of windmill blades with a moving point, construct the inside of several arcs, and animate the active point.

The Geometry Artboard trial is only available for 20 minutes, and the things you draw can't be saved, only after you sign up. Now it is difficult to search for the registration code, only to the geometry artboard Chinese official website.

Purchased.

The Geometry Artboard can draw any geometric shape, including function images. In a right triangle, the ratio of the hypotenuse of an acute angle to its adjacent edge (i.e., the adjacent edge of the hypotenuse of angle a) is called the secant of the acute angle, which is denoted by sec. If the sides of the right triangle are a, b, c, then seca=c b.

In y=secx, any value of x that makes secx meaningful and its corresponding y value as (x,y) The graph made in a Cartesian coordinate system is called the image of the secant function, also known as the secant curve. In layman's terms, secant is the reciprocal of the cosine function. Then draw the secant function image in the geometry artboard as shown in the figure below, if you have any questions, you can go to the following figure ** to view the tutorial.

Using the geometric drawing board, we can give students a vivid lesson, using the geometric drawing board to make courseware including scenario creation, mathematical experiments, inductive conjectures, proofs, etc., which is convenient for demonstration in the classroom, you can find it, there will be what you want.