determine whether the points are colinear .
A(1,-3) B(2,-5)C(-4,7)
Answers
Answered by
6
Step-by-step explanation:
A(1,−3),B(2,−5),C(−4,7)
AB=
(1−2)
2
+(−3−(−5))
2
(−1)
2
+2
2
=
5
BC=
(2−(−4))
2
+(−5−7)
2
36+144
180
=6
5
AC=
(−1−(−4))
2
+(−3−7)
2
=
25+100
=
125
=5
5
AB+AC=BC
5
+5
5
=6
5
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