Identify Faces of 3D Shapes
š¤ Show me your face! Fat shapes are usually built by gluing a bunch of flat shapes together. What flat pieces did they use?
Concept
The flat sides of a 3D object are called its **FACES**. šÆ **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 _______.