GoblinsCreate Account
Standards/Math/District of Columbia/8.G.A.1

8.G.A.1

8.G.A Understand congruence and similarity using physical models, transparencies, or geometry software.
8.G.A.1
8.G.A.1.a8.G.A.1.b8.G.A.1.c
8.G.A.2
8.G.A.3
8.G.A.4
8.G.A.5

Verify experimentally the properties of rotations, reflections, and translations:

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.
Khan Academy Resources
Mapping shapesReflect shapesDetermine rotations (basic)Rotate points (basic)Find measures using rigid transformationsIdentify transformations Reflect pointsRotate pointsRigid transformations: preserved propertiesDetermine reflectionsDetermine translationsTranslate shapesDetermine rotationsRigid transformations intro
Goblins

1-on-1 AI tutoring aligned to 8.G.A.1. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →

Resources

Privacy PolicyTerms of ServiceCareersTeacher LoginStudent Login

Communities

Access 4 Learning Community, Student Data Privacy Consortium
Goblins

© 2023-2026 Aha Moments, Inc.