8.G.A.1

Sub-standards

• 8.G.A.1.aLines are taken to lines, and line segments to line segments of the same length.
• 8.G.A.1.bAngles are taken to angles of the same measure.
• 8.G.A.1.cParallel lines are taken to parallel lines.

Where this sits in the school year

Our Grade 8 Math scope and sequence teaches 8.G.A.1 in Unit 1: Transformations & Congruence, weeks 1–3.

Establish rigid motions and what they preserve, then define congruence as a sequence of those motions. See the full pacing guide →

Builds on

Suggested prerequisites. This sequencing is our editorial guidance, not part of the Common Core.

Teaching Kits for this standard

Browse the library filtered to 8.G.A.1 →