Before learning the ASA formula, let us recall what is congruence. If two triangles are congruent it means that three sides of one triangle will be (respectively) equal to the three sides of the other and three angles of one triangle will be (respectively) equal to the three angles of the other. We need not know all the angles and sides of two triangles to determine if they are congruent. We can simply use the ASA formula.
What Is the ASA Formula?
ASA formula is one of the criteria used to determine congruence. ASA congruence criterion states that,
"if two angles of one triangle, and the side contained between these two angles, are respectively equal to two angles of another triangle and the side contained between them, then the two triangles will be congruent".
Let us see the applications of the ASA formula in the following section.
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