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Common Core · High School Geometry · Congruence

Standard G.CO.A.3

Free lessons and printable worksheets aligned to Common Core math standard G.CO.A.3.

3 lessons3 worksheets

Lessons for G.CO.A.3

Regular polygons and their circlesThe angle at the center between two neighboring vertices, equal to 360 degrees divided by the side count.Lesson
Line symmetryA figure has line symmetry when a reflection maps it exactly onto itself.Lesson
Rotational and point symmetryA figure has rotational symmetry when a turn of less than a full circle maps it onto itself.Lesson

Printable Worksheets

Regular polygons and their circles worksheet (PDF)Printable worksheet with answer keyPreview
Line symmetry worksheet (PDF)Printable worksheet with answer keyPreview
Rotational and point symmetry worksheet (PDF)Printable worksheet with answer keyPreview