Math Analysis Honors Learning Log 8.5 Name ______________________________

On last night’s homework I did not understand how to …

Find the determinant of the matrix using the method of expansion of cofactors using the second row.

Find the determinant using the method of repeated columns.

The area of a triangle with vertices (a,b), (c,d) and (e,f) is: A = _________________________

Find the area of the triangle with vertices (-1,2), (2,4) and (5,-1).

Are the following points collinear? (7,5), (-3,1) and (2,3) Determine using a matrix.

Use Cramer’s Rule to solve

Before I leave I need to know…