Given a list of coords for 3 points,
    Compute the area of this triangle.

    Args:
        pts: [a, b, c] three points

def get_tri_area(pts):
    """
    Given a list of coords for 3 points,
    Compute the area of this triangle.

    Args:
        pts: [a, b, c] three points
    """
    a, b, c = pts[0], pts[1], pts[2]
    v1 = np.array(b) - np.array(a)
    v2 = np.array(c) - np.array(a)
    area_tri = abs(sp.linalg.norm(sp.cross(v1, v2)) / 2)
    return area_tri