Measurement and Geometry 25 prisms non-prisms

prism cube 6 square faces 12 edges 8 vertices Measurement and Geometry 25

2 flat surfaces are circles not a prism cylinder 2 flat surfaces 1 curved surface 2 flat surfaces are circles Measurement and Geometry 25

2 flat surfaces, 1 curved surface and 2 curved lines. The three-dimensional object has 2 flat surfaces, 1 curved surface and 2 curved lines. What object did I describe? Measurement and Geometry 25

5 faces, 9 edges and 6 vertices. The three-dimensional object has What object did I describe? Measurement and Geometry 25

Reflection: How can we identify three-dimensional objects? Investigation: Sit in pairs or small groups. Select three-dimensional objects. Take turns to select an object. The friends describe and name the object, including naming it a prism or non-prism. Take turns to describe one of the objects without touching the object, naming the object a prism or non-prism. The friends suggest what object it could be. Reflection: How can we identify three-dimensional objects? In my hand I have an object which is a prism. It has 6 faces. Its faces are all squares. What object do I have? In a bag I can feel an object that is not a prism. It has 2 flat surfaces and 1 curved surface. The flat surfaces are circles. What object do I have? Measurement and Geometry 25

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Reflection: How can we identify three-dimensional objects? Investigation: Have a selection of prisms. Take it in turns to • select a prism without touching it • describe the faces as a two-dimensional shapes • describe the flat surfaces with straight lines as faces and edges • name the shape a prism or non-prism. Your friends identify the prism from the description. Reflection: How can we identify three-dimensional objects? Measurement and Geometry 25

Reflection: How can we identify three-dimensional objects? Investigation: Have a selection of non-prisms. Take it in turns to • select a non-prism without touching it • describe the faces as a two-dimensional shapes • describe the flat surfaces with curved lines as flat surfaces and curved lines • name the shape a prism or non-prism. Your friends identify the non-prism from the description. Reflection: How can we identify three-dimensional objects? Measurement and Geometry 25

Reflection: How can we identify three-dimensional objects? Investigation: Sit in pairs or small groups. Have a bag in which an object has been placed. One child: • places their hand into the bag and describes the object. • names their object a prism or non-prism. The other child / children suggest what object it could be. Reflection: How can we identify three-dimensional objects? Measurement and Geometry 25

Reflection: How can we identify three-dimensional objects? Investigation: Sit with some friends. Have some objects. Take turns to describe the surfaces of one of the objects, without touching the object, naming the object a prism or non-prism. The friends suggest what object it could be. Reflection: How can we identify three-dimensional objects? Measurement and Geometry 25

Reflection: How can we identify three-dimensional objects? Investigation: Sit with some friends. Have some objects. Take turns to describe the surfaces of one of the objects, without touching the object, naming the object a prism or non-prism. The friends suggest what object it could be. Reflection: How can we identify three-dimensional objects? Measurement and Geometry 25