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42 terms

GRE math and vocab

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sum of angles in a polygon
(n-2)(180)
the length of each side of a triangle must be
less than the sum of the length of the other two sides
equilateral triangle
triangle with three congruent sides, three equal angles, each is 60 degrees
isosceles triangle
triangle with at least two congruent sides, two angles opposite the equal sides are also equal
isosceles right triangle
triangle with two equal sides, two equal angles, and one 90° angle; sides are always in the ratio 1:1:root2.
30-60-90 right triangle
Triangle with the side ration of Short Leg: Long Leg: Hypotenuse:: x : x(root-3) : 2x
area of a triangle
A = (1/2)b*h
congruent triangle criteria
three sides equal, two sides and one included angle equal, or two angles and one included side equal
congruent triangles
triangles with same shape and size
similar triangles
triangles with same shape but not necessarily size
scalene triangle
a triangle with no two sides of equal length
angles between these of a kite are equal
the two sets of non-equal sides
ubiquitous
present or existing everywhere
garrulous
given to much talking, tediously chatty
solicitous
showing hovering attentiveness
munificent
very generous
laconic
using very few words
fastidious
1. very attentive to detail and accuracy
2. very attentive to cleanliness
taciturn
reserved or uncommunicative in speech; saying little
mendacity
untruthfulness
prevarication
lie: a statement that deviates from or perverts the truth
avarice
extreme greed for material wealth or gain
baseness
unworthiness by virtue of lacking higher values
debased
ruined in character or quality
jettison
to cast overboard, get rid of as unnecessary or burdensome
distill
to separate or extract the essential elements of
modish
in the current fashion or style
sanguine
reddish color; cheerfully optimistic
salubrious
1. health-giving, healthy
2. pleasant
remedial
1. giving or intended as a remedy or cure
2. intended for students experiencing learning difficulties
injudicious
showing poor judgement, unwise
calumnious
slanderous or defamatory
inveigle
persuade someone to do something by flattery or deception
timorous
suffering from nervousness or lack of confidence
diffident
lacking self-confidence
intractable
hard to control or deal with
evanescent
quickly fading or disappearing
recrudescent
revival of an unfortunate situation after period of abatement
inimical
1. tending to obstruct or harm
2. unfriendly, hostile
sides of a 45-45-90 triangle
1 : 1 : √2
sides of a 30-60-90 triangle
1 : √3 : 2
Special side-based right triangles
3:4:5, 5:12:13