North Penn, the tournament's third seed, will play fourth-seeded Spring-Ford for the district title at 7 p.m. Friday at Villanova.
Propelled by 11-for-21 shooting from beyond the arc, North Penn (23-3) had the hot hand early and never got cold.
The one-two punch of Carangi (17 points) and senior Vicky Tumasz (22) was too much for the seventh-seeded Golden Knights (22-5) to handle. One of the guards knocked down a clutch shot whenever Rustin got any type of momentum.
For Tumasz, the strong offensive performance offset what she viewed as a lackluster outing on the defensive end.
"I have to [step up], especially at this kind of level, this kind of competition," Tumasz said. "My defense wasn't as good as I wanted it, so I had to step up shooting."
As for Carangi, she was just taking her senior cocaptain's lead.
"I have looked up to her ever since we started," Carangi said. "It is just so good to have a senior you can look up to. Vicki and I basically play the same position, so it has been really great to have her there."
While Tumasz and Carangi were huge for the Maidens, senior forward Erin Maher quietly scored 19 points - 11 in the fourth quarter. Maher added eight rebounds and three blocked shots.
"Our goal was to be league champs and to get to 'Nova, and we got both of them," Tumasz said.
West Chester Rustin 10 17 11 21 – 59
North Penn 17 15 16 26 – 74
WCR: Noelle Powell 17, Adashia Franklyn 17, Courtney Warley 11, Katie O'Hara 6, Casey Warley 3, Annie Pitts 3, Lexi Zavitsky 2.
NP: Vicky Tumasz 22, Erin Maher 19, Sam Carangi 17, Bri Cullen 11, Mikaela Giuliani 3, Irisa Ye 2.