SEARCH HOME
 Math Central Quandaries & Queries
 Question from Nazrul, a teacher: In the triangle ABC, AB>AC and the bisector AD of angle BAC intersects BC at D. How can I prove that angle ADB is an obtuse angle.

Hi Nazrul,

What does the fact that the length of $AB$ is larger than the length of $AC$ tell you about the measures of the angles $ABC$ and $BCA?$

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.