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 (age 6+)

Mathematics · Geometry · conceptual

Identify and describe properties of 2-D shapes including the number of sides and line symmetry in a vertical line

What mastery looks like

Count the number of sides of a given 2-D shape
Identify whether a 2-D shape has a vertical line of symmetry
Use properties (number of sides, symmetry) to describe and distinguish between shapes

Check your understanding

Can 2-D shapes (age 6+) count the sides of a shape and say whether it has a line of symmetry — for example, knowing that a rectangle is symmetrical but a scalene triangle is not?

Prerequisites

Required first

Helpful

Angles in triangles (age 6+)

Knowledge-graph map

2-D shapes (age 6+)

What mastery looks like

Check your understanding

Prerequisites

Unlocks (5 directly)