Definitions Flashcards
(15 cards)
A quadrilateral is a parallelogram if and only if both pairs of opposite sides are parallel.
Definition 1
A parallelogram is a rectangle if and only if it has a right angle.
Definition 2
A parallelogram is a rhombus if and only if it has a pair of consecutive congruent sides.
Definition 3
A rectangle is a square if and only if it has a pair of consecutive congruent sides.
Definition 4
A quadrilateral is a trapezoid if and only if it has exactly one pair of parallel sides.
Definition 5
A trapezoid is an isosceles trapezoid if and only if its legs are congruent.
Definition 6
A quadrilateral is a kite if and only if it has exactly two distinct pairs of consecutive sides that are congruent.
Definition 7
A dart is a concave kite.
Definition 7 Definition 8
A segment is a median of a trapezoid if and only if it joins the midpoints of the legs of the trapezoid.
Definition 9
Given two numbers x and y, y (not =) 0, a ratio is the quotient x divided by y.
Definition 10
A proportion is the equality of two
ratios.
Definition 11
x is the geometric mean or (mean
proportional) between positive numbers p and q
if and only if where the means
are both equal to 6, then 6 is the
geometric mean of the other terms 4
and 9.
𝒑
𝒙
=
𝒙
𝒒
where x > 0.
Definition 12
Two polygons are similar, (~), if and
only if their corresponding angles are
congruent and the lengths of their
corresponding sides are in proportion.
Definition 13
The ratio of similitude (also called scale
factor or similarity ratio) of two similar
polygons is the ratio of the lengths of any
two corresponding sides.
Definition 14
Two line segments are said to be divided
proportionally when the ratio of the lengths of the
segments into which one is divided is equal to the ratio
of the lengths of the corresponding segments into which
the other is divided.
Definition 15
