Identify Faces of 3D Shapes
π€ Show me your face! Fat shapes are usually built by gluing a bunch of flat shapes together. What flat pieces did they use?
Do this: Read the concept below, then try the quiz or activity.
Concept
The flat sides of a 3D object are called its FACES.
π― The Face Inspector: Look at a Cube. * Look at just one of the flat walls. What shape is the wall? It's a Square! * A cube is built out of 6 Square faces.
Look at a Cylinder. * Look at the flat top. What shape is the lid? It's a Circle! * Look at the flat bottom. Another Circle! * A cylinder has 2 flat Circle faces.
Look at a Cone. * It only has 1 flat face (the bottom). It is a Circle!
Try it
Inspect the walls!
Instructions: Look closely at the flat walls (faces) of the fat shape to figure out what 2D shape it was built from.
Problem 1: You are looking at a Rectangular Prism (a cereal box). What shapes are the large walls built out of? * Answer: ____________
Problem 2: You are looking at a Cylinder (a soup can). What shape is the top lid? * Answer: ____________
Problem 3: You are looking at a Sphere (a bowling ball). How many FLAT faces does it have? * Answer: ____ (Zero! It is completely curved!).
Problem 4: A Cube is built out of six _______.