leonhard euler
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AnswerGottfried Leibniz
It was created for the use of congruence between segments, angles, and triangles. Also it was created for the transitional property of congruence, symmetry property of congruence, and Reflexive property of congruence.
Conventionally you use the symbol that looks like an "equals" sign but consists of three lines. It is the same symbol as is used for identities. ABC ≡ PQR
What mathematical symbol? Different symbols were invented in different times and places.
who invented equal to symbol