AI Tutor

Premium Lesson

Upgrade to unlock this lesson, practice questions, and your personal tutor.

This lesson is part of a track

Public learning track

Compass-and-Straightedge Geometric Constructions

8th Grade · Math · Open Global Math

11 lessons

Goal

Execute classic compass-and-straightedge constructions and construct formal geometric proofs justifying why each construction works.

11 lessons
0 of 11 done
  1. Copying Segments and Angles with Compass and StraightedgeUp next
  2. Constructing Perpendicular Bisectors and MidpointsNot started yet
  3. Constructing Angle BisectorsNot started yet
  4. Constructing Perpendicular Lines Through a Point on or off a LineNot started yet
  5. Constructing Parallel Lines Through a Given PointNot started yet
  6. Constructing Triangles from Given SSS, SAS, and ASA ConditionsYou are here
  7. Constructing Equilateral Triangles and Regular HexagonsNot started yet
  8. Constructing Squares and Inscribed Regular PolygonsNot started yet
  9. Constructing Inscribed and Circumscribed Circles of TrianglesNot started yet
  10. Constructing Tangent Lines to a Circle from an External PointNot started yet
  11. Using Constructions to Prove Geometric PropertiesNot started yet
View full track

Learning standards covered

GlobalOGM.9.GEO.7Open Global Math Standards 2026™ · 8th Grade

Execute compass-and-straightedge geometric constructions (angle bisector, perpendicular bisector, copying angles, parallel lines, triangles from given elements, inscribed/circumscribed circles, regular polygons, circle tangents).