An angle is two rays that share a common endpoint.
This is two angles that add up to 180 degrees
this is pretty self explanatory two lines that intersect
a solid or hollow object that tapers from a circular or roughly circular base to a point.
An angle that has measure more than 90° and less than 180°.
US usage, definition 2: A quadrilateral which has one parallel pair of opposite sides and one non-parallel pair of opposite sides. The parallel sides are called the bases, and the other two sides are called the legs.