### Math Notes

Subjects

#### Analytic Geometry Solutions

##### Topics || Problems

Find the area of the triangle with the vertices given, (2,3), (1, 1)(-2,-2)
$$A = \frac{1}{2}\begin{vmatrix}{2}&{3}&{1}\\{1}&{1}&{1}\\{-2}&{-2}&{1}\end{vmatrix}$$

$$A = \frac{1}{2} |-3|$$

$$A = \frac{3}{2}$$ Square Units