Find the area of triangle whose vertices are (1,-2) (2,3) and (4,5)

Question

asked Jul 2, 2024 197k views

2 Answers

Arkadiusz Raszeja · Answer 1 · 2024-07-06T10:55:39+0000

Answer:

4 units²

Explanation:

Calculate some vectors from the point (2,3).

Vector A = <1, 5>

Vector B = <-2, -2>

The area of the triangle is 1/2 * (the magnitude of the cross product of the vectors)

A × B = -2 + 10 = 8

the magnitude of 8 is 8.

Therefore 1/2 * 8 = 4