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Common Core · High School Geometry · Similarity, Right Triangles, and Trigonometry

Standard G.SRT.A.3

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

3 lessons2 worksheets

Lessons for G.SRT.A.3

AA similarityTwo pairs of congruent angles are enough to make two triangles similar.Lesson
Proofs about similar figuresArguments that establish proportional sides once two pairs of angles have been matched.Lesson
SSS and SAS similarityTriangles are similar when all three pairs of sides are in the same ratio, or when two pairs are and the angles between them are equal.Lesson

Printable Worksheets

AA similarity worksheet (PDF)Printable worksheet with answer keyPreview
SSS and SAS similarity worksheet (PDF)Printable worksheet with answer keyPreview