Education Technology

Areas of Polygons

Use determinants of matrices as a tool to find the areas of triangles and quadrilaterals.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Coded Messages

Determine the product of two matrices and calculate the inverse of the 2 X 2 matrix.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Matrix Inverses

Modify a 2 X 2 matrix being multiplied by another 2 X 2 matrix until their product is the identity matrix.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Matrix Multiplication

Examine matrix multiplication to identify the conditions necessary to be able to multiply two matrices.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Matrix Transformations

Grab vertices of a polygon undergoing reflections and rotations in the coordinate plane to determine the transformation’s type.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

Solving Systems with Row Operations 1

Use row operations to reduce an augmented matrix to its reduced row-echelon form.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

Solving Systems with Row Operations 2

Use matrices as a tool to solve a system of three equations with three unknowns.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

The Determinant of a Matrix

Calculate the determinant of a matrix and evaluate it to calculate the area of a triangle or quadrilateral.
• TI-Nspire™
• TI-Nspire™ CAS