C-09-Q132mediumsingle_mcqIn the 45∘45^\circ45∘ derivation, in right △OPM\triangle OPM△OPM with ∠POM=45∘\angle POM = 45^\circ∠POM=45∘, PMPMPM and OMOMOM are—aequalbperpendicularcunequaldparallel