A right-angled triangle PQR has right angle at Q. You are given PQ = 7cm and PR = 25cm.
(i) Construct triangle PQR accurately with basic instruments.
(ii) On the opposite side of PR, construct another triangle P'Q'R' having P'R' = 25cm, P'Q' = 7cm and right angle at Q'.
(iii) Prove, with suitable reasoning, that triangles PQR and P'Q'R' are congruent.
(iv) Measure QR and Q'R' and comment on their equality.