Generally speaking, the verification of two congruent triangles is judged by the hypotenuse and right-angled side (HL) of side (SSS), corner (SAS), corner (ASA), corner (AAS) and right-angled triangle.

Extended data

use

1, the congruence of triangle is a condition, and the conclusion is that the corresponding angles and sides are equal. When writing the congruence of two triangles, the corresponding vertices, angles and edges must be written in the same order, which provides convenience for finding the corresponding edges and angles.

2. When there are more than two equilateral triangles in the figure, we should first consider using SAS to find the congruent triangles.

3. In practice, we usually use congruent triangles to measure equidistant distance. And can be used in industry and military affairs.

4. Triangle has certain stability, so we use this principle to make scaffolding and other supports.

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