Point A (0,3),B(-2,9),C(-1,4)ARE VERTICES OF TRIANGLE ABC AT A. FIND VALUE OFa

Question

Word problem

Answer 1

Value of a means I assume here we have to find length of side a

 

side a is opposite to angle A so side a = side BC

 

distance formula 

 

d=sqrt[(x2-x1)^2 +(y2-y1)^2]

 

here B(-2,9) and C(-1,4)

 

d=sqrt [(-1-(-2))^2+(4-9)^2]

 

  = sqrt[(1+25)]

  

  =sqrt(26)

 

 =5.09