a piece of chalk
art
aspiration
back
background
blackboard
blue
board
child
class
desk
drawn
education
element
exact sciences
formula
geometry
graphic
hand
illustration
knowledge
lecturer
letter
mark
mathematics
old
painting
retro
school
semester
sign
sketch
solution
study
surface area
symbol
teacher
template
text
tor
torus
vintage
volume
white
work of fiction
定額
Tor. Sketch of a geometric figure and formulas for calculating its surface area and volume drawn in chalk on chalkboardの素材 [FY310172702978]
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