Can you classified a equilateral triangle?

An equilateral triangle has 3 equal sides and angles. Each angle is
60 degrees.

An equilateral triangle is one having all sides equal and where all angles are to 60°. Also all equilateral triangles are similar to each other.

Agc and bgd are vertical angles

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )