M= y2-y1 -7- -1
------- = _-6_ = -3/2
x2-x1 5 -1 4
By definition of supplementary angles,
∠ABD + ∠BDE = 180
5x + 17x - 18 = 180
22x = 198
x = 9
∠ABD = 5(9) = 45°
∠BDE = 180 - 45 = 135°
Answer:
Supplementary
Step-by-step explanation:
Supplementary angles add to 180 degrees.