Ideas in this flowchart

• Complex Numbers and Imaginary Unit
• Real Number Squaring
• Real Numbers Squared
• Positive Result
• Complex Plane Introduction
• Adding Second Dimension
• Complex Plane Axes
• Imaginary Unit 'i'
• Properties of 'i'
• i equals √-1
• Multiplication by 'i'
• Rotation by 90 Degrees
• Result of Multiplying by 'i'
• i Squared Equals -1
• i Cubed and Beyond
• Repeating Pattern