SAS postulate theorem.
Congurency of triangles:
- Triangles that are identical in size and shape are said to be congruent triangles.
- Inferred from this is that the matching sides and angles are equal.
- Without checking each of the triangles' sides and angles, we can determine whether the two triangles are congruent.
Rules of congruency for triangles:
- SSS Criterion - Side-Side-Side.
- SAS Criterion - Side-Angle-Side.
- ASA Criterion - Angle-Side- Angle.
- AAS Criterion - Angle-Angle-Side.
- RHS Criterion - Right angle- Hypotenuse-Side.
Solution -
As we can see that Line AD=DC (Given).
∠ADB=∠CDB
Line DB=DB (Common line).
Therefore, we can say that the SAS postulate theorem can be used to prove the triangle ABD+CBD.
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