Formulas
a squared plus b squared is equal to c square
Pythagorean Theorem
This will result in a right angle being formed between objects. Slopes are opposite and reciprocal
Perpendicular
Two sides and an included angle are marked congruent
SAS
A triangle that has all the sides the same and all the angles equal to 60 is two things
Equilateral and Acute
This center is created by Altitudes
Orthocenter
d is equal to the square root of the sum of the squares of the differences of the x-values and y-values
Distance Formula
When some thing is split into two, equal pieces
Bisect
Two angles and an included side are marked congruent
ASA
A triangle that has a 90 degree angle and two sides the same is two things
Right and Isosceles
This center is created by Medians
Centroid
The average between two x-values and two y-values can be found with this formula, giving you a point equally between the two
Midpoint Formula
When two things are on the same plane, but will never intersect... the slopes are the same
Parallel
Two angles and a non-included side are marked congruent
AAS
A triangle with not a single side the same, and one angle is slightly bigger than 90 is two things
Scalene and Obtuse
This center is created by Angle Bisectors
Incenter
The change is the y-values is over the change in x-values and set equal to an m-value
Slope Formula
When an object is mathematically the same, in geometry it is considered
Congruent
All three sides are marked congruent
SSS
A triangle with two sides the same, and the vertex angle is 40 degrees
Acute and Isosceles
This center is created by PerpendicularBisectors
Circumcenter
What's the best first thing to do any time you use a formula
Label
Three lines meet at a common intersection
Concurrent Lines
A right angle, the opposite side and any other side are marked congruent
HL
This Theorem allows you to find any angle in a triangle if at least two are known. What is it and what is the "set-up"
Triangle Sum Theorem and the sum in 180
What's the relationship of the medians in a Centroid situation?
Proportional: 1/3 vs 2/3