Answer:
ASA congruence postulate
Explanation:
Consider the diagram below:
• Angle: ,Angle ABK is congruent to Angle CBK.
,
• Side: ,|BK| is congruent to |BK|.
,
• Angle: ,Angle AKB is congruent to Angle CKB.
Thus, we can say that triangles ABK and CBK above can be proven congruent by the ASA congruence postulate.