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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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What Is an Angle?

Mathematics · Geometry · conceptual

Understand that an angle is a geometric shape formed by two rays sharing a common endpoint (vertex); recognise angles in real-life contexts and 2-D shapes

What mastery looks like

  • Identify the vertex and arms of an angle in a diagram
  • Find examples of angles in the classroom (e.g. open door, clock hands)
  • Explain why two rays meeting at a point form an angle

Check your understanding

If you draw two lines starting from the same point on paper, can What Is an Angle? tell you that the space between them is an angle — and point to the vertex where they meet?

Prerequisites

Required first

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