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GeoGebra Lesson

Angle Bisectors and Altitudes Notes2

Author:Kevin Tanton

How to bisect an angle.

In your own words, describe the steps taken to bisect an angle.

Guided Practice

Bisect the following angles.

Let's practice some more on constructing a line through a point not on the line, perpendicular to the line.

Now with a triangle. Construct a perpendicular to the side opposite A, through point A.

What you have just constructed is called an altitude. Construct all three altitudes of the triangles below.

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