Graphical and textual operation method for drawing the internal tangent line of a circle on the geometric sketchpad

php editor Zimo introduces you to a simple and practical method for drawing the internal tangent line of a circle. Drawing common tangents of a circle is one of the commonly used techniques in graphics and text operations. It can help us better understand and apply circular geometry knowledge. In this article, we will introduce this method of operation in detail, hoping to help you with your drawing learning and practice. By mastering this technique, you can use circular elements more flexibly in graphic creations to add new ideas to your works.

1. Use the circle tool to construct two circles A and B. The centers of the circles are A and B respectively. Select points A and B, and select [Construction] - [Straight Line]; pick any point C on circle B, Connect the construction line segments BC.

2. Select point A and line segment BC, select [Construction] - [Parallel Lines], and intersect circle A at points D and I.

3. Select points C and I, select [Construction] - [Line Segment], and intersect straight line AB at point J.

4. Select points A and J, select [Construction] - [Line Segment], select line segment AJ, then select [Construction] - [Midpoint], the midpoint is marked K.

5. Select points K and A(J) in turn, select [Construction] - [Draw a circle with the center and points on the circumference], and intersect circle A at points L and M. .

6. Construct straight lines JL and JM respectively, which are the required internal common tangents. Just hide the extra circles, points, lines, etc.

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