Question

Is these points (0,9) (0,-9) and (3,6) form



a.Triangle or not?

Answer 1

let the points be P Q and R
P(0,9)- x1=0 y1=9
Q(0,-9)- x2=0 y2=-9
R(3.6)- x3=3 y3=6


slope of PQ = y2-y1/ x2-x1
=-9-9/0-0
=-18/0
=0


slope of QR=y3-y2/x3-x2
=6+9/3-0
=15/3
=5

slope of PR=y3-y1/x3-x1
=6-9/3-0
=-3/0
=0

slope of PQ=PR
but slope of PQ is not equal to QR

therefore these points form a triangle