Question

31. Determine if the points (3,1),(6, 4) and (8,6) are collinear.
OR
Find the area of the triangle whose vertices are (-5,1),(3,-5) and (5,2)​

Answer 1

Answer:

1. m = 1
2. 0

Step-by-step explanation:

1st que find slope

a (3,1) b (6,4) c (8,6)

from a nd b

m = y2 -y1 / x2-x1

4-1 /6-3 = 3/3 =1

then b nd c

m = 6-4 / 8 -6 = 2/2 =1

bath have same valve 1 so these are collinear

I 2nd que u apply the formula

1/2(x (y2-y3) + x2 ( y3 -y1) + x3 ( y1 - y2) )

1/2 ( 3 (4-6) + 6 (6-1) + 8 (1-4) )

=1/2 (-6 +30 -24)

1/2 ( 30 -30)

1/2 (0)

=0