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STANDARD G.CO.C.10
GEO

Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

WORKSHEETS Regents-Interior and Exterior Angles of Triangles 1a
GEO/GE/A
MC
4/11/6 TST
PDF
DOC
Regents-Interior and Exterior Angles of Triangles 1b
GEO/GE/A
bimodal
TST
PDF
DOC
Regents-Interior and Exterior Angles of Triangles 2
GE/A
4/2 TST
PDF
DOC
Regents-Exterior Angle Theorem 1
GEO/GE
6/14 TST
PDF
DOC
Regents-Exterior Angle Theorem 2
A
9 TST
PDF
DOC
Regents-Triangle Inequality Theorem
GE/A/B
8/10/1 TST
PDF
DOC
Regents-Angle Side Relationship
GEO/GE/A
2/17/1 TST
PDF
DOC
Regents-Midsegments
GEO/GE
6/16 TST
PDF
DOC
Regents-Triangle Proofs
GEO/GE
4/1 TST
PDF
DOC
Regents-Medians, Altitudes and Bisectors
GEO/GE/B
4/3/1 TST
PDF
DOC
Regents-Centroid, Orthocenter, Incenter and Circumcenter
GEO/GE
4/24 TST
PDF
DOC
Practice-Interior and Exterior Angles of Triangles 1 10 WS
PDF
Practice-Interior and Exterior Angles of Triangles 2 6 WS
PDF
Practice-Exterior Angle Theorem 6 WS
PDF
Practice-Triangle Inequality Theorem 10 WS
PDF
Practice-Angle Side Relationship 6 WS
PDF
Practice-Midsegments 10 WS
PDF
Practice-Triangle Proofs 2 WS
PDF
Practice-Centroid, Orthocenter, Incenter and Circumcenter 3 WS
PDF
Journal-Interior and Exterior Angles of Triangles 5 WS
PDF
Journal-Midsegments 2 WS
PDF
 
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