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STANDARD G.CO.C.11

Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals.

WORKSHEETS Regents-Interior and Exterior Angles of Polygons 1a
GE/A
18/8 TST
PDF
DOC
TNS
Regents-Interior and Exterior Angles of Polygons 1b
GE/A
TST
PDF
DOC
Regents-Parallelograms 1
GEO
7 TST
PDF
DOC
TNS
Regents-Parallelograms 2
GE/A
10/6 TST
PDF
DOC
TNS
Regents-Trapezoids 1a
GE
MC
12 TST
PDF
DOC
TNS
Regents-Trapezoids 1b
GE
bimodal
TST
PDF
DOC
Regents-Trapezoids 2
GE/A/B
3/1/1 TST
PDF
DOC
TNS
Regents-Special Quadrilaterals 1a
GEO/GE/A
MC
1/9/3 TST
PDF
DOC
TNS
Regents-Special Quadrilaterals 1b
GEO/GE/A
bimodal
TST
PDF
DOC
Regents-Special Quadrilaterals 2
GEO/GE/A
MC
4/10/4 TST
PDF
DOC
TNS
Regents-Special Quadrilaterals 3
GE/A
open ended
1/5 TST
PDF
DOC
TNS
Regents-Quadrilateral Proofs
GEO/GE/B
2/2/1 TST
PDF
DOC
TNS
Practice-Interior and Exterior Angles of Polygons 1
regular
9 WS
PDF
Practice-Interior and Exterior Angles of Polygons 2
irregular
5 WS
PDF
Practice-Parallelograms 1 12 WS
PDF
Practice-Parallelograms 2 6 WS
PDF
Practice-Trapezoids 9 WS
PDF
Practice-Special Quadrilaterals 1 12 WS
PDF
Practice-Special Quadrilaterals 2 13 WS
PDF
Practice-Quadrilateral Proofs 6 WS
PDF
Journal-Interior and Exterior Angles of Polygons 3 WS
PDF
Journal-Special Quadrilaterals 15 WS
PDF
VIDEOS Applying the Polygon Angle-Sum Theorem VID
Applying the Exterior Angle Theorem VID
Finding unknown values in parallelograms involving the sides VID
Finding unknown values in parallelograms involving diagonals
Proving a quadrilateral is a parallelogram VID
Using properties of trapezoids VID
Using diagonals of rhombuses VID
Using diagonals of rectangles
Using properties of quadrilaterals

VID

Classifying quadrilaterals
 
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