# How to find the determinant of a matrix in Geogebra

In this lesson I'll explain how to calculate the determinant of a matrix using Geogebra.

**What is the determinant of a matrix?** It is a number (scalar value) that describes the algebraic properties of a square matrix.

Make a square matrix.

For example, a 3x3 matrix.

**How to create a matrix on Geogebra?** If you don't know how to do, read our tutorial and then come back to this page.

Now type the function **Determinant()** and put the name of the array between the round brackets. Then press enter.

Geogebra calculates and displays the determinant of the matrix.

In this case the determinant is -65.

**Note**. You can only calculate the determinant on matrices that have the same number of rows and columns (square matrices). You cannot calculate it on rectangular matrices.

If this lesson from StemKB is useful, keep following us.