Pi number, mathematical constant chalk drawing on a school black board, Male hand write decimal digits with a chalk

---

Size: 7777px × 4187px
Photo credit: © Rawf8 / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: , background, black, blackboard, board, calculate, celebrate, chalk, chalkboard, circle, class, color, constant, day, decimal, draw, education, exam, formula, greek, hand, handwriting, happy, lesson, letter, male, march, math, mathematical, mathematics, number, people, pi, ratio, school, sign, student, symbol, teach, teacher, text, white, write