Question

What is the area of a triangle whose vertices are R(-4,2),S(1,2), and T(-5,-4)

Answer 1

The answer to your question is 30 u²

Explanation:

Vertices

R(-4, 2)

S (1, 2)

T (-5, -4)

Find the area using matrices X Y

R -4 2

S 1 2

T -5 -4

R -4 2

=| (-4 x 2) + (1 x -4) + (-5 x 2) - [(-4 x -4) + (-5 x 2) + (1 x 2)]|

= |-8 - 4 - 10 - [ 16 - 10 + 2]|

= |-22 - [ 8]|

= |-22 - 8|

= |-30|

= |-30|

Area = 30 u²