Derive
Definition
Obtain a result or formula from earlier results through logical steps.
Explanation
Start with known facts or equations, then show each step that leads to the new result.
Example
Derive the equation for the area of a triangle from the area of a rectangle.
In an exam
Command-word meanings can vary between subjects, exam boards and mark schemes, so check your own board's guidance. See Exam Command Words: What Each Instruction Asks For.
Common confusion
Derive is more formal than explain. Every step must follow logically.