Ononot — A triangle in the plane has vertices at (0,0), (x1, y1), and

Determinantshard

0:00.0

A triangle in the plane has vertices at $(0,0)$ , $(x_1, y_1)$ , and $(x_2, y_2)$ . The area is given by the absolute value of $\frac{1}{2} \det(M)$ . What is $M$ ?