Classifying Triangles
No Equal Sides or Angles
What is Scalene
Sum of interior angles of a triangle
What is 180 degrees
What does CPCTC stand for
Congruent Parts of Congruent Triangles are congruent
Side across the 90 degree angle in a right triangle is called
hypotenuse
An isosceles triangle has _________ sides congruent
At least two
At least two equal sides and angles
What is Isosceles
Angles that add up to 90 degrees
Complementary Angles
If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then these two triangles are congruent.
What is SAS
The sum of the two acute angles in a right triangle.
90 degrees
Two angles that share a side called a base
All angles are equal.
What is Equilangular
When two lines intersect the opposite angles are equal to each other.
What is vertical angles
If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then these two triangles are congruent.
What is ASA
The two sides of a right triangle that form the 90 degree angle.
What are the legs
The side of an isosceles triangle that is not always congruent.
What is a base
Has an angle whose measurement is greater then 90 degrees.
What is Obtuse
(n-2)*180
Sum of interior angles of an n-sided polygon
If two angles and the non-included side one triangle are congruent to two angles and the non-included angle of another triangle, then these two triangles are congruent.
What is AAS
It states if the hypotenuse and a leg of one right triangle are congruent to the hypotenuse and a leg of another right triangle, then the triangles are congruent.
What is Hypotenuse-Leg Theorem
Isosceles Triangle Theorem converse
If two angles in a triangle are congruent, then the sides opposite those angles are also congruent.
All angles measure less then 90 degrees.
What is an acute triangle
An exterior angle of a triangle is equal to the sum of the __________________.
Remote interior angles
Cannot be used to prove triangles congruent
What is SSA or AAA
Besides one angle you need this number of sides to prove a right triangle congruent to another right triangle
2
The point where two congruent legs in an isosceles triangle come together.
What is Vertex Angle