Question

In a triangle ABC with vertices A (2,3) , B (4,-1) ,C (1,2). Find the equation and length of altitude from the vertex A.

Answer 1

ab = root (x2 - x1 )2 + y2- y1
root (4-2)2 +(-1-3)2
4+16=20=2root 5

Answer 2

I hope this answer is correct