Answer:
x - 4 = 0 and x - 2 = 0
Step-by-step explanation:

Answer:
3
Step-by-step explanation:
Segment BC corresponds to segment DF. The length of BC is the distance between coordinates (0, 2) and (3, 2). These points are on the same horizontal line (y=2), so the distance between them is the difference of their x-coordinates: 3 - 0 = 3.
I think question 2 is 3 millimeters
Because diameter = 2r (R = radius)