Are triangles necessarily congruent, is: 1. Each side of one triangle is equal to one of the other triangle's sides. 2. If the two triangles are right and each cathetus of one triangle is equal to a cathetus from the other triangle. 3. If the angles of one triangle are equal to the angles of the other triangle.

Question
Are triangles necessarily congruent, is:
1. Each side of one triangle is equal to one of the other triangle's sides.
2. If the two triangles are right and each cathetus of one triangle is equal to a cathetus from the other triangle.
3. If the angles of one triangle are equal to the angles of the other triangle.

2020-11-27
1. Yes, they're congruent by SSS (Side-Side-Side).
2. Yes, they're congruent by SAS (Side-Angle-Side).
3. They're similar, but not necessarily congruent.

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