Masonius tallied her first double-double of the season and tied her season high with 15 points for the Terps. She played 37 minutes and was a team-high plus-34.
The Terps advance to Saturday's Big Ten tournament semifinal, where they'll play the winner of No. 4 seeded Michigan State and No. 5 seeded Nebraska at 2 p.m. EST.
The Terps have a 26 percent success rate on free position shots, the third-worst in the country, but the stat doesn't encapsulate how they approach those opportunities.
While depth has been an issue for the Terps throughout the year, their role players excelled on Thursday to help the team advance to the conference tournament quarterfinal.