Which shows two triangles that are congruent by the SSS congruence theorem?
SSS congruence theorem (Side-Side-Side) states that if all the sides of two triangles are equal in measure both the triangles will be congruent.
By SSS congruence theorem, figure 4 will show the given triangles congruent.
By applying SSS theorem of congruence in figure - 1,
In ΔABC and ΔDEC,
AB ≅ DE (Given)
But other two sides are not equal.
Therefore, ΔABC and ΔDEC are not congruent.
By applying SSS theorem of congruence in figure - 2,
In ΔABC and ΔEDC,
AB ≅ ED (Given)
BC ≅ DC (Given)
But third side of both the triangles are not equal.
Therefore, ΔABC and ΔEDC are not congruent.
By applying SSS theorem of congruence in figure - 3,
In ΔABC and ΔEDC,
AC ≅ EC (Given)
But other two sides of these triangles are not equal.
Therefore, ΔABC and ΔEDC are not congruent.
By applying SSS theorem of congruence in figure - 4,
In ΔABC and ΔADC,
AB ≅ AD (Given)
BC ≅ DC (Given)
AC ≅ AC (Reflexive property)
Therefore, ΔABC ≅ ΔADC
Hence, In figure - 4, given triangles ΔABC and ΔADC will be congruent.
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