G-CO.12 Construction #4 Bisecting an Angle

Bisect Angle ABC.
Steps.[br]1. Center your compass at B, and draw an arc that intersects both ray BA and BC at points E and F.[br]2. Using E and F as centers, draw two arcs with the same radii that intersect at point D. (Point D should be in the interior of [math]\angle[/math] ABC.)[br]3. Draw ray BD. Ray BD is the angle bisector.
Angle ABC is acute.
Angle ABC is obtuse.
What do you notice? What do you wonder?
Schließen

Information: G-CO.12 Construction #4 Bisecting an Angle