Question 258555
The difference is this:
SSS means side-side - side. We need all three sides of the triangle congruent to call the entire triangle congruent.
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ASA means angle - side - angle. We need two angles and the included side, or side between two angles to be congruent before we can call the triangles congruent.
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SAS means side-angle-side. We need two sides and the included angle, or angle between two sides to be congruent before we can call the triangles congruent.
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Your book should have pictures as well.