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Geometry Vocabulary

TermDefinition
polyhedron a three-dimensional figure in which all the surfaces or faces are polygons
net an arrangement of 2-D figures that can be folded (along edges) to become the faces of the polyhedron
pyramid polygon base with triangular faces that meet in a vertex
face a flat surface of a solid
base how 3-D figures are classified; usually the bases' shape is different from other faces
prism all faces other than or including bases are rectangles
vertex the point where two or more edges meet
edge line segment where two faces meet
cylinder two congruent circular bases connected by a curved lateral surface
cone a 3-D figure with one vertex and one circular base
parallelogram a quadrilateral with two pairs of parallel sides
square a parallelogram with four congruent sides and four right angles.
composite shape two or more shapes that are put together to make a new shape
area of a triangle formula (Base x Height) / 2
area of a square or rectangle formula Length x Width
Created by: CoriBryson
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