Kongruenssisäännöt
Kongruenssisäännöt, also known as the laws of congruence or congruence rules, are fundamental principles in elementary geometry used to determine if two triangles are congruent. Congruent triangles are identical in shape and size; all corresponding sides and angles are equal. These rules provide shortcuts for proving congruence without needing to verify all six pairs of corresponding parts.
The most common congruence rules are SSS, SAS, ASA, and AAS. The SSS rule states that if
The ASA rule dictates that if two angles and the included side (the side between those two
There is also a specific congruence rule for right-angled triangles, RHS (or hypotenuse-leg), which states that