Mathematically, two figures can completely coincide, or two objects have the same shape, so the two figures are congruent. "congruence" is represented by the symbol "",which is pronounced as "all equals". (Example: △ ABC △ A' b' c, pronounced as triangle ABC, is equal to triangle A 'b 'c).

In mathematics, congruence generally refers to congruent triangles. Congruent triangles refers to two triangles with the same shape. Congruent triangles's corresponding angles and sides are equal.

Other common mathematical relationship symbols are as follows:

Extended materials:

There are more than 200 mathematical symbols commonly used in modern mathematics, and each symbol has an interesting experience. The most common allusions of "+"are as follows:

The wine merchant "-"indicates how much wine is sold in the barrel. After the new wine is poured into the vat, a vertical line is added to the "-",which means that the original line is erased, thus becoming a "+"sign. /kloc-In the 5th century, German mathematician Wei Demei officially determined that "+"was used as a plus sign and "-"was used as a minus sign.

References:

Baidu encyclopedia-mathematical symbols

References:

Baidu encyclopedia-Congdeng