1. Which statement is not true?

A. Perpendicular lines always form a right angle.
B. Lines that form a right angle are parallel lines.
C. Parallel lines are always the same distance apart.
D. Two lines are parallel if and only if they lie in the same plane and do not intersect.

2. Refer to Figure 1, a d with e as the transversal. What must be true about 23 and 24 if b | c with e, also as the transversal?
A. 23 is greater than 24.
B. 23 is congruent to 24.
C. 23 is a supplement of 24.
D. 23 is a complement of 24.

3. Refer to Figure 2. Lines m and n are parallel cut by transversal t which is also perpendicular to m and n. Which statement is not correct?
A. 41 and 26 are congruent.
B. 22 and 23 are supplementary.
C. 23 and 25 are congruent angles.
D. 21 and 24 form a linear pair.

4. Refer to Figure 3. What theorem proves, if a 1 c and b 1 c, then a || b?

A. Two lines are parallel if they do not intersect.
B. Two lines are perpendicular if they intersect at right angles.
C. In a plane, if two lines are perpendicular to the same line, the the two lines are parallel.
D. Given a line and a point on the line, there is only one line through the given point that is perpendicular to the given line.​