Detailed method of drawing tangent line of circle using geometric sketchpad

Many beginners are confused when using geometric sketchpad to draw tangent lines of a circle. PHP editor Xigua will provide a step-by-step guide on how to draw the tangent line of a circle in this summary. In this guide, you'll learn how to: Determine the point to which a tangent line cuts Use the theorem of reflection to draw a tangent line Use other tools like lines and angles to draw a tangent line If you're having trouble drawing a tangent line to a circle, keep reading for more details , learn step-by-step guides and helpful tips to make mastering this geometry skill a breeze.

1. Construct circles and line segments. Use the circle tool to create a circle O. Select the [Point Tool] and draw point C at an appropriate position outside the circle. Then select the [Line Segment Tool] and draw the line segment OC.

2. Construct the midpoint. Select the line segment OC and select the [Construction]-[Midpoint] command to create the midpoint D of the line segment OC.

3. Make a circle. Select point D and point O, and select [Draw a circle with the center and points on the circumference] in the menu [Construction].

4. Construct a triangle. The intersection points of the two circles are E and F. Use the [Line Segment Tool] to connect the line segments CF, CE, OF, and OE.

5. Hide the circle and excess points. Select circle D, point D, and point B, and select the [Show]-[Hide Object] command.

6. Change the line style. Select the line segments CO, EO, and FO, and select [Line Style] - [Thin] - [Dotted Line] in the [Display] menu. The tangent line of the circle is drawn.

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