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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2-D shapes

Mathematics · Geometry · conceptual

Recognise and name common 2-D shapes (circles, triangles, rectangles including squares)

What mastery looks like

Name a triangle, circle, rectangle, and square when shown them
Identify a shape correctly regardless of its size or orientation
Pick out all the triangles from a mixed set of shapes

Check your understanding

Can 2-D shapes point to shapes around the house — like a clock, a window, or a pizza — and correctly name whether each is a circle, triangle, rectangle, or square?

Prerequisites

None — this is a foundational concept.

Unlocks (7 directly)

Angles in triangles (age 6+)
Flat vs Solid Shapes
Composing Shapes
2-D shapes (age 6+)
2-D faces on 3-D shapes
Combining Simple Shapes
3-D shapes (age 5+)

Knowledge-graph map

2-D shapes

What mastery looks like

Check your understanding

Prerequisites

Unlocks (7 directly)