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Unit 1 Vocabulary

TermDefinition
area The _____ of a two-dimensional region, measured in square units, is the number of unit squares that cover the region without gaps or overlaps.
region Examples of two-dimensional _____ include the interior of a circle of the interior of a polygon.
rearrange/rearranging We we decompose a figure into pieces and put them back together in a different way, we are _____ the pieces.
compose _____ means "put together" several geometric figures together to make a new figure.
decompose _____ means "take apart" several geometric figures.
parallelogram A _____ is a four-sided polygon with two pairs of parallel sides.
base Any of the four sides of a parallelogram can be chosen as a ______. The term _____ can also refer to the length of this side.
height of a parallelogram Once you have chosen a base, then the perpendicular segment from a point on the base of a parallelogram to the opposite side will always have the same length. We call that value the ______.
opposite vertex When you choose a side to be the base in a triangle, the vertex that is not an endpoint of the base is the ...........
base Any of the three sides of a triangle can be chosen as a ........... The term .......... can also refer to the length of this side.
height Once we have chosen a base, the corresponding ............ is the length of a perpendicular segment from the base to the vertex opposite it.
polygon A ............... is a two-dimensional figure composed of a sequence of straight line segments, connected end-to-end, with the last one connecting back to the first.
side A line segment in a polygon is called a ........... (it is also called an edge).
edge A line segment in a polygon is called an ........... (it is also called a side).
sides Sometimes the faces of a polyhedron are called its ...........
vertex A .......... is a point where two edges meet in a polygon or a polyhedron.
quadrilateral A .............. is a four-sided polygon.
surface area The ........... (in square units) is the number of unit squares it takes to cover all the surfaces of a three-dimensional figure without gaps or overlaps.
face Any flat surface on a three-dimensional figure is a ...........
net A .......... is a two-dimensional representation of a polyhedron. It can be cut out and folded to make a model of the polyhedron.
pyramid A ........... is a type of polyhedron that has one special face called the base.
prism A ........... is a type of polyhedron with two parallel faces that are identical copies of each other (called bases) connected by rectangles.
polyhedron (polyhedra) A ........... is a three-dimensional figure with faces that are polygonal regions (filled-in polygons).
square An expression with an exponent of 2 is sometimes called a square.
cube An expression with an exponent of 3 is sometimes called a ............
Created by: MS.R
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