Side angle side means if you have a side and an included angle, which means if I said side de and side df the included angle would be angle d so it's the angle that's formed by those two sides then here you can also say those two triangles must be congruent. The second shortcut that we're going to talk about is side angle side. But what do side side side mean? It means if all you know is the 3 sides of one triangle are congruent and corresponding to the 3 sides of another triangle, then yes those two triangles must be congruent. There are a couple of shortcuts and we're going to talk about two. Do we always need to know that those 3 angles and those three sides are congruent? And the answer is no. It explains how to prove if two triangles are congruent using. So this is a whole work going on here there's 6 different parts of these two triangles that could be congruent. This geometry video tutorial provides a basic introduction into triangle congruence theorems. And then we can talk about the sides, de will be congruent to ab, bc would be congruent to ef and df would be congruent to ac. The full form of SAS is 'Side-Angle-Side' and SSS stands for 'Side-Side-Side. If two triangles are congruent, if I say that triangle abc and triangle def are congruent then that means that all of their corresponding parts are also congruent which means a and d will be congruent angle b and angle e will be congruent, angle c and angle f will be congruent. Both SAS and SSS rules are the triangle congruence rules.
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