Lessons for G.CO.B.8
Rigid motions and congruenceTwo figures are congruent exactly when some sequence of slides, flips and turns carries one onto the other.Lesson
SSS, SAS, ASA, AASThe short lists of matching parts that force two triangles to be congruent.Lesson
Hypotenuse leg congruenceRight triangles are congruent when their hypotenuses match and one pair of legs matches.Lesson
Why AAA and SSA failTwo sides and an angle that is not between them can build two different triangles, so they do not force congruence.Lesson
Printable Worksheets
Rigid motions and congruence worksheet (PDF)Printable worksheet with answer keyPreview
SSS, SAS, ASA, AAS worksheet (PDF)Printable worksheet with answer keyPreview
Hypotenuse leg congruence worksheet (PDF)Printable worksheet with answer keyPreview
Why AAA and SSA fail worksheet (PDF)Printable worksheet with answer keyPreview