In this topic, students will:
use attributes to describe shapes
define 2D shapes by their attributes
use different materials to make shapes
put shapes together to make another shape
use shapes to make different shapes
define 3D shapes by their number of edges, vertices, and faces or flat surfaces
Vocabulary:
Triangle - a closed shape with 3 corners
Hexagon - a closed shape with 6 corners
2D shapes - flat figures that have only length and width. These shapes do not have thickness or height
Attribute - something that helps define a shape
Side - a line that joins two vertices
Vertex - another name for the corner of a shape
Rectangle - a special kind of rectangle
Square - a shape that has 4 sides and 4 vertices that have square corners
3D shapes - a solid figure or an object or shape that has three dimensions— length, width, and height
Flat surface - the surface of a solid shape that is flat
Cylinder - a three-dimensional shape in geometry. A cylinder is round and has a top and bottom in the shape of a circle.
Cone - a three-dimensional shape that narrows from a flat circular base to a point called a vertex.
Edges - formed when 2 faces come together
Faces - the flat surface on a shape that does not roll
Rectangular prism - a 3D shape with 6 rectangular faces, 12 edges, and 8 vertices
Sphere - a 3D shape with no flat surfaces or vertices
Cube - a 3D shape with 6 square faces and 8 vertices
At-home Practice:
Collect items from around the house, then sort them by their shapes. Discuss the different characteristics of each shape.
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Supplies:
a 6-sided die
paper and pencil
Player 1 rolls the die. Whatever number he/she lands on, Player 1 will draw a shape with that many sides. (ex. Player 1 rolls a 4 and draws a square). If Players roll a 1 or 2, he/she may roll again.