Still don’t know how to use the geometric sketchpad to draw a tangent line to a circle through a point on the circle? Today, the author will popularize the detailed steps of using the geometric sketchpad to draw the tangent line of a circle through a point on the circle. Friends in need can take a look and understand it. I believe it can help everyone.

Draw a circle

Open the geometric drawing board, select the "Circle Tool" in the left sidebar and draw a circle O on the drawing board, then use the "Point Tool" to make a point P on the circle to make a tangent line.

Example of using the circle tool to draw a circle O on the drawing board. Click the "Custom Tools" button on the left sidebar, select the "Circle Tool" from the pop-up shortcut option - draw a tangent line of the circle through a point on the circle,

Click the mouse on the center O of the circle, then drag the mouse to point P and click the mouse again, and then you can see the tangent line is created.

Intercept tangent line

The tangent line created now is an infinitely long straight line. We want to shorten it. First, select the "Point Tool" to draw a line on the line segment to intercept the endpoint of the line segment.

​​Select the "Line Segment Ruler Tool" to connect the two endpoints, right-click on the straight line and select "Hide Perpendicular Line".

At this point, the tangent line of the circle passing through a point on the circle is ready.

Come and learn the detailed steps of using the geometric sketchpad to draw the tangent line of a circle through a point on the circle. It will definitely help everyone.