Examine the cone. A cone. Point A is the vertex, B is the center point of the base, C B is the radius, C D is the diameter, and
A B is the height. Identify the parts of the cone. Which letter represents the center of the base? Which letter represents the vertex? Which line segment can represent the radius? Which line segment can represent the height? Which line segment can represent the diameter?
A right triangle would meet these characteristics. A triangle's inner angles always add up to be 180 degrees. A right triangle has one angle at 90 degrees meaning the other two angles need to be less than 90 degrees and sum up to be 90 degrees. This would indicate that both of these angles' exterior angles would be obtuse because they would be wider than 90 degrees.
