Question

find acceleration and velocity of an object moving on an inclined plane

Answer 1

l parallel to m
and, P parallel to q
to prove:- ∆ABC = ∆CDA
∆ BCA =∆ DCA ( alternative interior angles)
∆BAC = ∆DCA ( alternative interior angles)
And, side AC is common
therefore,by ASA congruence,
∆ ABC = ∆CDA