Steps to draw exterior angle bisectors of a triangle using geometric sketchpad

Geometric Sketchpad is a powerful geometric drawing software. The steps for drawing graphics are very simple. Today, PHP Editor Strawberry will take drawing the bisector of the exterior angle of a triangle as an example to provide you with detailed steps. If you need to draw the exterior angle bisectors of a triangle, read on to learn the steps.

Draw a triangle. Open the geometric sketchpad, select the [Line Segment Tool] on the left sidebar, draw a triangle in the working area on the right, and use the [Text Tool] to mark the vertices of the triangle as A, B, and C, as shown in the figure.

Construct the exterior angle. For example, here we want to construct the exterior angle bisector of ∠ACB, so we must first draw the exterior angle of ∠ACB. Use the [Move Tool] to select points A and C in sequence, click the [Construction] menu on the upper menu bar, and select the [Ray] command from its drop-down option, thus obtaining the ray AC. Pick any point D on ray AC, and then you will get the exterior angle ∠DCB of the triangle.

Construct the bisector of the exterior angle. Use the [Move Tool] to select points D, C, and B in sequence, click the [Construction] menu on the upper menu bar, and select the [Angle Bisector] command from its drop-down option. This way you get the angle bisector of ∠DCB, which is a triangle. bisector of the exterior angle.

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