Tangent.
Because he thought they were unnatural.
Perpendicular
A line of interception.
If they measure 90 degrees then they are perpendicular. Other than that they are just intersecting lines
Parallel lines can have a line crossing both of them. They call that the transversal. Corresponding angles are on the same side of the transversal. Alternate are on opposite sides of the transversal.
An intersection
Perpendicular lines.
Straight
Because he thought they were unnatural.
light travels in straight paths called rays
a sex when a male is on top of a female
A polygon is a plane area bounded by straight lines. Two straight lines cannot define a closed shape. There cannot, therefore by a polygon with only two sides.
Meridian
A crossing or a zebra crossing.
transversal
An apeirogon. Apeirogons are degenerate polygons that probably appear as never ending straight lines
Perpendicular