Which always share the properties of parallel lines?

A. the intersection of a wall and ceiling

B. the front edges of horizontal shelves in a bookshelf

C. the hands of a clock

D. the top and side edge of a window

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

if i put something wrong your not gonna like it so rather not say nothing.