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Chapter 5
geo. note cards
22
Mathematics
10th Grade
03/10/2010

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Term
LL
Definition
leg,leg
Term
HA
Definition
Hypotenuse,angle
Term

LA
Definition
Leg,angle
Term
HL
Definition
hypotenuse,leg
Term
Midsegment
Definition
connects midpoints on a triangle
Term
Median
Definition
segment that goes from vertex to midpoint.
Term
altitude
Definition
segment that goes from vertex of a triangle, perpendicular to the oppposite side
Term
perpendicular bisector
Definition
line in a triangle tat is perpendicular and bisects 1 side
Term
Concurrent lines
Definition
3 or more lines in a triangle,intersect at a point
Term
Point of concurrency
Definition
point of intersection
Term
circumcenter
Definition
point where 3 perpendicular bisectors of a triangle meet at
Term
incenter
Definition
point where 3 angle bisectors meet
Term
centroid
Definition
point where 3 medians of a triangle meet, always located inside of the triangle
Term
perpendicular bisector theorem
Definition
any pint on the perpendicular bisector or a segment is equidistant from the endpoints of the segment
Term
angle bisector theorem
Definition
if a point is on the bisector of an angle, thenthe point is equidistant from the sides of the angle
Term
orthocenter
Definition
point where the 3 altitudes meet
Term
comparison property
Definition
a<b, a=b or a>b,comparing values
Term
transitive property
Definition
A<B and B<C the A<A
Term
addittion/subtraction property
Definition
A>B then a+c>b+c (+ or -)
Term
Triangle exterior angle theorem
Definition
angle opposite of the longest side will be the longest angle------angle opposite of the smallest angle will be the smallest side
Term
Inequality theorem
Definition
the sum of the lenghts of any two sides of a triangle will be greater than the 3rd side
Term
Inderect proofs
Definition
assume that opposite of the proof part
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