In order to prove that ABEC = ABAC, one must use the formal forceful tone and indicate approval about the topic. The most appropriate way to do this is to use the Side-Angle-Side (SAS) theorem. This theorem states that if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent. Therefore, if the corresponding congruent parts of the two triangles are marked, then the SAS theorem can be applied to prove that ABEC = ABAC.
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Answer:
In order to prove that ABEC = ABAC, one must use the formal forceful tone and indicate approval about the topic. The most appropriate way to do this is to use the Side-Angle-Side (SAS) theorem. This theorem states that if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent. Therefore, if the corresponding congruent parts of the two triangles are marked, then the SAS theorem can be applied to prove that ABEC = ABAC.