Command Words

Explain

A short written statement showing why your answer is correct, using mathematical language.

Definition

"Explain" requires a sentence, not just a calculation. The sentence must use correct mathematical vocabulary and reference the relevant rule, theorem or definition.

Example

Explain why a triangle with angles 30°, 60°, 90° is a right-angled triangle. Answer: "Because one of its angles is 90°."

Related terms

Describe

Write a complete sentence describing what was asked — usually a transformation needs every component.

Give reasons / Give a reason

In angle and circle questions, name the theorem or rule that justifies your step.

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