art golden blackboard mathematics proportion board design art isolated black

---

Size: 4687px × 3979px
Photo credit: © PixelsAway / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: architectural, architecture, art, black, blackboard, board, chalk, chalkboard, clipping, construction, deep, definition, design, equation, golden, green, isolated, jetblack, mathematics, number, path, proportion, ratio, style, swarthy, white