© 2008 National Council of Teachers of Mathematics http://illuminations.nctm.org

Sorting Cards Carefully cut out each of the cards. You will need these words and phrases for the sorting activity.

Opposite Sides

Parallel

Opposite Sides

Congruent

At Least One Obtuse Angle

At Least One Right Angle

All Sides

Congruent

All Angles

Congruent

Two Consecutive

Sides Congruent

Parallelogram Regular Polygon

© 2008 National Council of Teachers of Mathematics http://illuminations.nctm.org

Opposite Angles

Congruent Pentagon Hexagon

Octagon Rhombus Isosceles

Trapezoid Quadrilateral Convex Polygon

© 2008 National Council of Teachers of Mathematics http://illuminations.nctm.org

Concave Polygon