3-dimensional also called geometric shapes, are seen all around us on any given day.
What are 3 dimensional shapes?
3-dimensional shapes must have a length, width, and height. Examples of 3-simensional shapes are a cone, a cube, a pyramid, a sphere, a cylinder, and a rectangle prism.
Examples of a Cone are an waffle cone, a clowns hat, a mega phone.
Examples of a Cube are dice, puffs Kleenex box, and cheese cubes.
Examples of a Sphere are a soccer ball, a baseball, a pool ball, and a globe.
Examples of a cylinder are a pop can, some garbage cans, kaleidoscope, and a tootsie roll.
Examples of rectangular prisms are a gift box, a box, a jolly rancher, a window, and a door.
Kids probably play with 3-dimensional objects everyday with out even realizing it. There pencil is a 3-dimensional object.Many things they play with at recess are 3-dimensional objects.
One way to get students to really think about 3-dimensional shapes is to turn it into a contest by giving each student a piece of paper and giving them 2 minutes to write down as many 3-dimensional objects they can with not repeats. Students love contests and this would be an easy contest to do.
Here is a unit that you can teach students on 3-dimensional shapes.
http://www.mcrel.org/pdf/curriculum/5021cm_shapes.pdf
Here is a worksheet on 3D shapes
http://www.superteacherworksheets.com/geometry/solid-figures2_TZNDZ.pdf
You can teach them how to count the number of faces on a shape, how many edges a shapes has, how many vertices they have. I higher grades the students will learn how to find the area and perimeter of 3D shapes.
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