Thursday, January 30, 2014

2D and 3D Geometric Properties

We continue to work with identifying the geometric properties of 2D and 3D shapes. We are also talking about lines of symmetry in various 2D shapes.

Yesterday, Mrs. Swan's class sent us a wonder on Twitter. They asked us to find out what the line of symmetry in a trapezoid was. We had to Google what a trapezoid was. We learned that it is a quadrilateral. We also learned that a rhombus is another type of quadrilateral during a shapes review on our SmartBoard. Quadrilaterals are shapes that have 4 sides. Today we wondered what a heptagon was. It is a 2D shape with 7 sides and 7 vertices.

Today we built models of 2D and 3D shapes using toothpicks and marshmallows. We also described their geometric properties (sides, vertices, edges and faces). Our models are in our school bags - ask your child to describe the 3D shapes. How many faces, edges and vertices?
And just for fun, a 3D shape hunt was sent home in your child's agenda. They can look around at home to find some 3D shapes in places like the kitchen or their bedroom. Happy hunting!

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