Pythagorean theorem
Pythagorean theorem, math class in the school
young professor proving theorem on a blackboard b
young professor proving theorem on a blackboard b
young professor proving theorem on a blackboard b
young professor proving theorem on a blackboard b
Copybook with sketches of triangles held by geometry teacher explaining theorem
Maths formulas written by white chalk on the blackboard background.
Teacher by blackboard
Young confident teacher in eyeglasses and smart casualwear drawing angle
Hand of young teacher of geometry drawing triangle with unknown angle
Youthful student pointing at blackboard during explanation of equation
Young serious teacher of college or university drwing triangle on blackboard
Confident geometry teacher in formalwear pointing at blackboard with formulas
Formulas and calculations from mathematics and geometry on school blackboard
Now your questions please
Explanation of formulae
Explaining subject
Confident teacher of geometry pointing at drawing of triangle on blackboard
Give me little hint
Maths formulas written by white chalk on the blackboard background.
Math teacher explaining new topic
Teacher answering questions
Schoolgirl writing on whiteboard
Young serious female teacher of geometry listening to African American student
African American student writing down algebraic equation on blackboard
Maths formulas written by white chalk on the blackboard background.
Making fun of teacher
Teacher at work
Explaining trigonometry
