faces, edges, and vertices. Look at the shape below to see what each is.
face vertex edge Note: Faces must be flat!
Solid Shapes A cylinder has 2 faces and 2 edges. edge face
Solid Shapes A cube has 6 faces, 12 edges and 8 vertices. face vertex edge
Solid Shapes A cone has 1 face, 1 vertex and 1 edge. face edge face(on bottom)
Solid Shapes A square pyramid has 5 faces, 8 edges, and 5 vertices. face vertex edge
Solid Shapes A sphere has no faces, edges, or vertices, but we love it anyway!
Solid Shapes A rectangular prism has 6 faces, 12 edges, and 8 vertices, just like a square. face edge vertex
Lines and Angles We learned about 3 kinds of lines: lines line segments rays. line segment- has two endpoints line - goes on in both directions forever ray - has one endpoint, goes on in one way forever
Lines and Angles An angle is two rays connected at a vertex. We learned about 3 kinds of angles: right obtuse acute obtuse - larger(more open) than a right angle right - makes a perfect corner(90 ) acute - smaller(more closed) than a right angle
Circles are named by their center point. They have diameters, which are lines that cross through the center point and go from one side of the circle to the other. They also have radii (plural of radius) which go from the center point to a point on the circle.
Two shapes are similar if the are the same shape but not the same size.
Similarity These two shapes are similar because they are the same shape, but one is smaller. These two shapes are not similar because they even though they are both rectangles, they are not the same shape.