Year 12 students Lauren Arancini, Carys Atkinson and Olivia Everett were guided by teacher Shane Mawer.
They will be invited to attend the national round at Bond University in July.
Bond University’s Faculty of Law conducts an annual mooting competition designed to challenge students to prepare, articulate and defend complex arguments in order to solve problems.
Penrhos College politics and law teacher Shane Mawer said the girls excelled in the competition.
‘Teams are presented with an appeal case to the High Court with some teams for the appellant and others for the respondent,’ he said.
‘Students must use the facts of the case to argue points of law and must explain relevant legal principles, illustrate the application of those principles to the facts and convince the court of why their side should succeed.
‘The Year 12 Penrhos team excelled in doing this and won the WA State Final.’
Olivia was awarded the Best Mooting Barrister in WA and said the experience took her out of her comfort zone.
‘When we went into mooting, our team wasn’t really sure of what to expect,’ she said.
‘Although it is myself, Lauren and Carys at the forefront of it all, it really came down the assistance of our coaches Megan and Mr Mawer, who guided us in the right direction.
‘It was great because it allowed us to put into practise the knowledge we have of the law.’