15. What do you call the lines which do not meet nor intersect? A. Concurrent Lines C. Parallel Lines B. Intersecting Lines D. Perpendicular Lines 16. Which of the following illustrates perpendicular lines? A. Asterisk C. pedestrian lane B. letter X D. Logo of the Philippine Red Cross 17. What do you call the lines which intersect and formed right angles? A. Concurrent Lines C. Parallel Lines B. Intersecting Lines D. Perpendicular Lines 18. Which of the following angle pairs are always congruent? A. Complementary Angles C. Vertical Angles B. Supplementary Angles D. Linear Pair 19. ZM and 2N formed linear pair. What is the measure of ZM if ZN is 76°? A. 4° C. 76° B. 104° D. 176° 20. Two angles are supplementary. The first angle measures 127°, what is the measure of the second angle? A. 43° C. 53° B. 63° D. 73°