6. <CBD and <DBA are adjacent angles, what is their common sides?
A. ray BA
B. ray BC
C. ray BD
D. ray DE

7. If m< CBD = 90 and m< ABD = 30, what is m m<CBA?
A. 180°
B. 120°
C. 60°
D. 45°

8. If two angles form linear pair and the measure of one angle is 30°, what is the measure of the other angle?
A. 180°
B. 150°
C. 90°
D. 60°

9. Which of the following statements is always true?
A. When two lines intersect, they are perpendicular
B. When line are perpendicular, they form four angles
C. If lines are perpendicular, then they will never meet even if extended infinitely
D. Two lines are perpendicular if and only if they intersect and formed four right angles

10. In a linear pair, if one angle measures x, what is the measure of the other?
A. x - 90°
B. x - 180°
C. 90° - x
D. 180° - x

11. How do we read this symbol ll?
A. is parallel to
B. intersects at
C. is congruent to
D. is perpendicular to

12. Which of the following statements is always true?
A. Parallel lines are intersecting lines
B. Parallel lines are coplanar lines that intersect at a point
C. Parallel lines are lines in the same plane that do not intersect
D. Parallel lines are two lines that do not intersect and are not in the same plane

Patulong po needed napo now na​