Curated OER
Pythagorean Triple
Pupils investigate the properties of the Pythagorean Theorem. In this geometry lesson, students identify the missing angles and sides of a right triangle. They label the hypotenuse and legs of a right triangle correctly.
Curated OER
Snacks 'R Us
First graders experiment with fat content by analyzing snack foods. They learn what makes up a nutritious snack.
Cool Math
Coolmath: 3 X 3 Determinants Practice Exercises
This Algebra Cruncher generates an endless number of practice problems for 3x3 determinants with solutions!
Cool Math
Coolmath: Determinants for 3x3's Method 1
Discover one method to use determinants for 3x3s.
Cool Math
Coolmath: Determinants for 3x3's Method 2
Examine the second method to use determinants for 3x3s.
Purple Math
Purplemath: Determinants
A complete lesson on matrix determinants is offered here. From explanation of what a determinant is to how to find the determinant of a 2x2 or 3x3 matrix. Steps are written in and shown for the student or teacher's use. Also provided are...
Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 2
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 3
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Interactive Mathematics
Interactive Mathematics: Matrices and Linear Equations
Examples are provided to demonstrate how to use matrices to solve 2x2 and 3x3 matrices. Examples include real world applications and some are interactive.
Cool Math
Coolmath: Cramer's Rule for 3x3's
Use this tutorial to learn how Cramer's Rule works for 3 x 3.