Suppose ÐABC = 30°. If ÐABC is bisected, what would each of the new angles measure?
bi means two equal. what is half of 30 deg?
René Descartes is credited with
http://ualr.edu/lasmoller/descartes.html
15
To solve this problem, we need to use the concept of angle bisector.
An angle bisector is a line or ray that divides an angle into two equal angles.
Given that ÐABC = 30°, we want to find the measure of each of the new angles when ÐABC is bisected.
To bisect ÐABC, draw a line or ray starting from the vertex of ÐABC and ending at the opposite side. This line or ray will bisect ÐABC into two equal angles.
Since ÐABC = 30°, when it is bisected, each of the new angles will have a measure of 30° / 2 = 15°.
Therefore, each of the new angles formed when ÐABC is bisected will measure 15°.