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## Class 6 (Old)

### Course: Class 6 (Old)>Unit 9

Lesson 6: Three dimensional shapes

# Counting faces and edges of 3D shapes

Learn about shapes! Discover how to count faces and edges on 3D figures. We explore a transparent shape with five faces and another shape, a square pyramid, with eight edges and five faces. It's a colorful journey into geometry!

## Want to join the conversation?

• are vertices the same as edges
• No, vertices are like corners where three faces meet, with the exception of the apex, in which 4 or more faces meet in a pyramid.
• how can i identify faces and edges of a sphere? maybe its silly to ask but i am curious.
• A face is a flat surface on a solid, and edges are the lines at which faces meet, and a vertex is the point at which when three or more edges meet. A sphere has no flat surfaces, so it has no faces. Since it doesn't have faces, it can't have edges, or vertices.
• Do we have to add up all the sides together?
• what is a vertices
• A vertex is an intersecting point, or where two lines/sides meet. The plural form of vertex is vertices.
(1 vote)
• Baby I Don't Understand This G r i l e d C h e e s e Obama Sandwich
• faces are the flat parts vertices are the points and i think edges are the lines
(1 vote)
• how do you find the area of a triangle?
(1 vote)
• There are several ways, easiest is A=1/2 bh where b is the base and h is the height, these are perpendicular to each other.