Postulates and Theorems
C2= B2+A2
Pythagorean Theorem
If two lines are parallel, the same side interior angles are…
Supplementary
These quadrilaterals have 4 congruent angles.
Rectangle and Square
If 2 right triangles have congruent hypotenuses and one leg is congruent, then the triangles are congruent by the…
HL postulate
If the triangles are similar than all of the angles are…
Congruent
If a=b, and b=c, then a=c
Transitive property
Corresponding angles of parallel lines are…
Congruent
What is the formula for finding the sum of the interior angles
(N-2) 180
Every one of this type of triangle is congruent.
Equilateral/Equiangular
If 4/5=x/40, then x=?
X=32
What are the 4 postulates proving 2 triangles congruent?
SAS, SSS, ASA, AAS
Remember: NO BAD WORDS!
If 2 lines are skew, then they are not parallel, and not on…
The same plane
What is always the sum of the exterior angles
360 degrees
This type of triangle has 2 congruent angles.
Isosceles
When triangles are similar, their sides are…
Proportional
If the diagonals of a quadrilateral bisect eachother than the quadrilateral is a…
Parallelogram
When writing a proof, before saying that alternate interior angles are congruent you must prove…
That the lines are parallel
To find ONE interior angle of a polygon, what do you divide the interior angle sum by?
The number of sides
If the ____________ of a triangle are congruent then the ____________ of the triangle are congruent.
Angles; sides
OR
sides; angles
When discussing similar triangles, the ratio of one triangle to another is the…
Scale factor
These types of angles are ALWAYS congruent
Vertical
A line that run across 2 or more parallel lines is called a(n)…
Transversal
A polygon that has all congruent sides and angles is…
Regular
If you are writing a congruency statement the matter of the letters does not matter. (True or False)
False
True or False: Congruent is another word for proportionate
False