axis
background
circle
concept
design
development
discipline
doodle
drawing
education
element
emblem
equation
formula
geometry
homework
icon
illustration
instrument
isolated
knowledge
learning
math
mathematical
mathematics
monochrome
nobody
object
root
ruler
school
schooling
science
seminar
sign
simple
square
studying
symbol
task
theory
training
triangle
trigonometric
trigonometry
variable
web