Matrices & Vectors

Subject: Math  ·  Grade level: 11th

Add, multiply, and transform with matrices and vectors — the basis of linear algebra.

In this lesson

• Vectors — magnitude and direction
• Matrices — rectangular arrays
• Matrix multiplication
• Where you'll see them

Key terms

Vector

A quantity with both magnitude and direction.

Magnitude

The length of a vector. For ⟨a, b⟩, it equals √(a² + b²).

Scalar

A regular number, used to scale a vector.

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