Answer: the ASA Postulate
Explanation:
In the given picture , we have two triangles ∆LKM and ∆JKM , in which we have
![\angle{LKM}\cong\angle{JKM}\\\\\angle{LMK}\cong\angle{JMK}](https://img.qammunity.org/2020/formulas/mathematics/high-school/aon3huatnpmuc4fnwwo7e2lxlozmc687f8.png)
[common]
By using ASA congruence postulate , we have
∆LKM and ∆JKM
ASA congruence postulate tells that if two angles and the included side of a triangle are congruent to two angles and the included side of other triangle then the triangles are congruent.