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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

Teacher by blackboard

Teacher answering questions

Triangle ABD right-angled at A showing C on BD, C,D angles equal proving AC equals AD

Math teacher explaining new topic

Explaining trigonometry

Give me little hint

Schoolgirl writing on whiteboard

Point D lying off perpendicular bisector at x=4 cm, 18 cm from C, AB8 BC16 AC24cm

Teacher at work

Children or kid calculate mathematics with pencil about math with graph.

Now your questions please

Young serious female teacher of geometry listening to African American student

Maths formulas written by white chalk on the blackboard background.

Inequality proof presenting Cauchy-Schwarz derivation on white background with algebraic steps

Explaining subject

Explanation of formulae

Pythagoras the Samian at Pythagorion Port view Samos Island is populer tourist destination in Greece