Answer:
<h2>Leg-Acute (LA) Angle Theorem.</h2>
Step-by-step explanation:
We can use the postulate Leg-Acute Angle theorem to demonstrate the congruence.
This postulate states <em>"if a leg and an acute angle of one triangle are congruent to the corresponding parts of another right triangle, then those two right triangles are congruent".</em>
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So, in this case, we have
, by reflexive property, that is, a segment is congruent to itself.
, by Given.
So, with these two given congruence we demonstrate that
, by Leg-Acute Angle Postulate.
Therefore, the answer is <u>Leg-Acute Angle Postulate.</u>
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