a. Neither; 12° + 68° = 80°
b. Supplementary; 95° + 85° = 180°
c. Neither; 43° + 48° = 91°
d. Complementary; 70° + 20° = 90°
a. 140º
b. 105º
c. 60º
a. ∠1 = ∠AEB or ∠BEA
b. ∠2 = ∠BEC or ∠CEB
c. ∠3 = ∠CED or ∠DEC
d. ∠4 = ∠DEA or ∠AED
a. Right
b. Straight
c. Obtuse
d. Acute
a. Adjacent
b. Adjacent
c. Vertical
d. Vertical
a. perpendicular
b. parallel
c. perpendicular
d. neither
a. Yes, the lines are parallel. The rectangles create an optical illusion that makes the lines appear to be crooked.
b. Yes, the lines (3rd and 4th in diagram) are parallel. To show this is true, place two rulers or straightedges along the lines. You’ll then see that they’re parallel.
Step-by-step explanation:
