Answer:
m∠AED = 130°
Step-by-step explanation:
Definition of Supplementary Angles: 2 angles adjacent to each other that add up to 180°
Step 1: Define variables
m∠AEC = 50°
m∠AED = x (unknown)
Step 2: Set up equation
50 + x = 180
Step 3: Solve for x (subtract 50 on both sides)
x = 130°
Step 4: Replace variable x
m∠AED = 130°
