Question

find K if A (k,2),B(3,1),C(4,2) are the vertices of right angled triangle.

Answer 1

First calculate the distance between all the three points and then use Pythagoras theorem I very used in the pic... k=2

Answer 2

u can easily do this question using a graph .. without any calculation .....
k can be 2 also ... it'll become right angle at B .. so there's two answer k= 2,3 .... sorry , I didn't show it on graph .