≅Answer:
See below.
Step-by-step explanation:
If we rotate the shape on the right 90 degrees counterclockwise we see they fit together, because they are congruent. They are exactly equal in size and shape - that's what congruent means.
So the following angles are equal in measure:
m < A = m < R
m < B = m < S
m < C = m < P
m < D = m < Q.
Corresponding sides are also equal in length:
Sides AB = RS
BC = SP
CD = PQ
AD = RQ.
Note: in the US the symbol ≅ is used for equality of sides. I think it means 'is congruent to'. (I'm from the UK).
