Pythagoras' theorem on blackboard

---

Size: 5000px × 3750px
Photo credit: © Aleksandr Bryliaev / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: algebra, background, black, blackboard, board, chalk, chalkboard, class, classroom, drawing, drawn, education, geometry, green, hand, highschool, knowledge, learn, learning, lecture, lesson, math, mathematics, pythagor, pythagoras, room, school, seminar, student, teach, theorem, triangle, university, vector