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In the triangle ABC with vertices A (2...

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

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a triangle ABC with vertices A(2,3),B(4,−1),C(1,2).
Let AD be the perpendicular from the vertex A.
Now the slope of BC is `m1= (y2-y1)/ ( x2-x1)`
` =3/( -3)`
...
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NCERT ENGLISH-STRAIGHT LINES-EXERCISE 10.3
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