juniorLinear Algebra
What is identity matrix?
Updated May 16, 2026
Short answer
Identity matrix acts like number 1 in matrix multiplication.
Deep explanation
Multiplying any matrix by identity matrix returns the same matrix.
Unlock with a Pro subscription to view this section.
View pricingReal-world example
No real-world example available yet.
Unlock with a Pro subscription to view this section.
Upgrade to ProCommon mistakes
No common mistakes listed yet.
Unlock with a Pro subscription to view this section.
Upgrade to ProFollow-up questions
No follow-up questions available yet.
Unlock with a Pro subscription to view this section.
Upgrade to Pro