Question

Without using the distance formula, show
that the points A (4, 5), B (1, 2), C (4, 3)
and D (7, 6) are the vertices of a
right angled triangle​

Answer 1

Answer:

Slope of AB

−4−4

4+2

=

−8

6

=

4

−3

Slope of AC

(10−4)

6+2

=

6

8

=

3

4

slope of AB x slope of AC =

4

−3

×

3

4

=−1

Hence, it is Right angle triangle.