Curriculum placement

Geometry. This describes the skill, not a learner estimate.

Constructions with compass and straightedge

Construct bisectors perpendiculars and parallel lines with justified steps

Problem types

Reason about a compass-and-straightedge construction

Builds on

Precise definitions in geometry
Proofs about lines and angles · Useful idea
Points equidistant from two endpoints lie on the perpendicular bisector. That fact is why arcs of equal radius from both endpoints construct it.

Leads to

Related skills

Writing and critiquing a geometric proof · Shared foundations
What a transformation keeps · Shared foundations

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