How to draw a semicircle in a geometric palette

How does a geometric artboard draw a semicircle? Draw a circle in the geometry artboard, you may be, if you make a semicircle, you may not have made it! Let's take a look at how to make a semicircle from a geometric artboard.

Analysis: In a circle of the same arc in the circumference of the angle is half, according to the theorem, the circular angle of the semicircle is a good 90°, so we can make a right triangle to make semicircle.

The specific steps are as follows:

1. Open the Geometry artboard, click the "Custom Tool"--"triangle"-"Right triangle", click on the canvas above the mouse, and then drag the mouse to draw a right-angled triangle.

Using the custom tool to draw a right-angled triangle example

2. Use the move Arrow tool to select the three vertices of the right-angled triangle, click "Construct" on the menu bar--the arc over three points, and get the figure shown below.

Example of an arc with three points constructed over three vertices of a right-angled triangle

3. Select the two rectangular edges of the triangle and right-click to select "Hidden segment" so that the semicircle is made, as shown in the following figure.

Select right triangle two right side to execute hidden command

The above to explain the use of geometric artboards to make semicircle method, mainly in the semicircle of the nature of the understanding, and then there are targeted drawings.

The Round table is a kind of above small big three-dimensional figure, in the geometry sketchpad inside how can the fastest produce round Taiwan? Let's take a look at the method of making the circular table of the geometrical sketchpad.

First, draw the round table

1. Open the Geometry artboard, click the sidebar "Custom Tool"-"solid geometry"-round table.

Select "Custom Tool"--"solid geometry"--"Round Table" sample

2. Use the mouse in the blank position to determine the round center of the bottom of the circle, with the mouse to adjust the size and direction of the Round table and then click the mouse to draw a round table.

Using the Geometry Artboard custom tool to draw a round table sample

Second, adjust the round table

1. Adjust the size and direction of the round Table

Press and hold the center of the bottom circle red dot to drag, you can adjust the size of the bottom circle to adjust the size of the round table, and through rotation to adjust the direction of the round table.

Drag the center of the bottom circle to adjust the size and orientation of the round Table

2. Adjust the position of the round table

You can adjust the horizontal and vertical position of the round table by holding down any line above it and dragging it up or down.

Drag the line above the round table to adjust the position of the round table