AlgebraLab

Triangles and Special Lines

By S Bay

Directions and/or Common Information:

In each figure, solve for the unknown variable. Upper case letters represent unknown angles, while lower care letters represent unknown lengths.

 
Note: This is a regular polygon.

Directions and/or Common Information:

Answer each of the following questions with either: always, sometimes, or never.

Two parallel lines are __________ coplanar.

Two skew lines are ___________ coplanar.

Opposite rays ____________ form a line.

Two lines in the same plane are _____________ parallel.

Two planes that do not intersect are ___________ parallel.