Question

if the are of triangle abc formed by A(x,y) B(1,2) and C(2,1) is 6 square unit then prove that x+y =15​

Answer 1

Step-by-step explanation:

hope it helps you.....

Answer 2

Step-by-step explanation:

step-by-step explaination

As per condition

6= 1/2(x(2-1)+1(1-y)+2(y-2)

12=x+y=3

x+y=15