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Lesson: 6-1 Classifying Quadrilaterals
vocabulary for lesson 6-1
19
Mathematics
9th Grade
01/20/2011

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Term
congruent angles
Definition
Two angles are congruent if they have the same measure.
Term
opposite angles
Definition
The angles that are directly opposite to each other
Term
pairs of angles
Definition
two angles that are adjacent and supplementary
Term
right angles
Definition
the angle has a measurement of 90 degrees
Term
congruent sides
Definition
two sides that measure to be the same
Term
opposite sides
Definition
sides that are opposite of one another
Term
pairs of sides
Definition
two sides that are adjacent to one another
Term
verticle sides
Definition
sides that goes straight up and down, and whose slope is defined as infinite or undefined, and they lay on a flat surface by going from north to south
Term
horizontal sides
Definition
to sides whose slope is zero and they lay on a flat surface by going west to east.
Term
parallel
Definition
lines that run along one another but never intersect one another
Term
isosceles
Definition
two sides of a figure are equal in length
Term
quadrilateral
Definition
a four-sided polygon
Term
parallelogram
Definition
a quadrilateral with both pairs of opposite sides parallel
Term
rhombus
Definition
a parallelogram with four equilateral sides
Term
rectangle
Definition
a quadrilateral whose angles are all right angles
Term
square
Definition
an equilateral and equianglular quadrilateral
Term
kite
Definition
a quadrilateral that has two distinct pairs of consecutive equilateral sides
Term
trapezoid
Definition
a quadrilateral that has at least one pair of parallel sides
Term
isosceles trapezoid
Definition
a trapezoid that has a pair of equiangular base angles
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