how to find the area of a triangle with given eqations of 3 lines.....? i cannot understand the determinant method also what is a determinant

Hint: With the given 3 equaitons of lines of triangle, we can easily find the three coordinates of the triangle. Then by using the formula by determinant method, simply put the values of the three coordinates (x₁,y₁ x₂,y₂ x₃,y₃) in the formula and find its determinant to find the area of it. For Determinant please read the chapter matrix and determinant from any standard maths book. Thanks.