OER Commons
Oer Commons: Shape Characteristics
In this lesson, young scholars discuss what they know about shapes and their characteristics through a paper-folding activity that results in a parallelogram. Included are examples, discussion questions, and a reflection activity....
SMART Technologies
Smart: Polygons
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
Khan Academy
Khan Academy: Properties of Shapes
Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
National Council of Teachers of Mathematics
Nctm: Illuminations: Angle Sums
Students may use this computer applet to explore angle sums of triangle, quadrilaterals, pentagons and hexagons.