image tag: maths, orientation: vertical, image quantity: 3

2736x3648px
$slide rule, count, math, mathematics, school$
slide rule, count, math, mathematics, school
1964x2000px
$geometric, maths, math, mathematics, generated, shape, pattern$
geometric, maths, math, mathematics, generated, shape, pattern
2592x4608px
$zirkel, math, geometry, school, mathematics, teaching, study$
zirkel, math, geometry, school, mathematics, teaching, study