Apply Pythagoras:
length = sqrt( (10--4)² + (6-3)² ) = sqrt(205)
37.5 and 2.5. Divide each other and you get 15.
Answer:-4x-2
Step-by-step explanation:
-1(2x+3)-2(x-1)
-2x-3-2x+1
-4x-2
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The required additional information required to prove the Triangles congruent are :

The Triangles will be congruent by HL congruency.

The Triangles are congruent by LL congruency.

The Triangles are congruent by HA congruency.

The Triangles are congruent by LA congruency.