Day 19: Triangle (TT AU)

"I have never been so bored in my entire life."
Raven flicked her pen back and forth between her fingers, resting her chin in her other hand.
Dick and Kory were scribbling in their books, working their way through the set work for the lesson while the teacher prowled the room, looking over students' shoulders.
"Trigonometry is actually really interesting," Dick said without looking up. "Triangles are used in heaps of things, like construction and -"
Raven's glare made him shut his mouth.
"I must agree with Dick," Kory piped up cheerily. "I find it a facinating concept, all of these ways in which triangles function with numbers and equations..."
"Nerds," Raven muttered, sketching in the margins of her book.
"Do you need help with the questions, Raven?" Kory asked, leaning over to look at her blank page.
"No. I just don't see the point in wasting my time doing something so pointless as writing sums I already know how to solve."
"Practice makes perfect," Kory reminded her with a smile. Raven rolled her eyes. "Besides, you do not want to get a bad grade, do you?"
Raven's lips tightened into a thin line, and Kory knew she'd hit home.
"Fine." Raven put the date at the top of her page and shuffled her chair closer to Kory so she could see the textbook.
Kory kissed her lightly on the cheek, coaxing a smile from the stony-faced girl.
"Girls!" the teacher snapped. "Less canoodling, more triangles!"
Kory blushed. Raven muttered something darkly. Dick smirked.
"Ooh, busted."
"Shut up, Dick."