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Classifying Triangles
Angles, Angles, & Angles
Congruence Postulates
Right Triangles
Isosceles and Equilateral Triangles
100

This type of triangle has no equal sides or angles.

What is Scalene

100
Number of angles in a triangle.
What is 3 angles
100
This congruence postulate states that if all three sides of one triangle are congruent to all three sides of another triangle, these two triangles are congruent.

What is SSS

100
It states that the sum of the squares of the legs of a right triangle equals the square of the hypotenuse of a right triangle.
What is the Pythagorean Theorem?
100

This type of triangle has two congruent sides called legs.

What is Isosceles Triangle

200

This type of triangle has two congruent sides and two congruent angles.

What is Isosceles

200
The value of all three angles in a triangle added together.
What is 180 degrees
200

This congruence postulate states that 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

200
The sum of the two acute angles in a right triangle.
What is 90 degrees
200

This type of triangle has three congruent sides.

What is Equilateral Triangle

300

In this type of triangle, all sides and angles are equal.

What is Equilateral

300
When two lines intersect the opposite angles are equal to each other.
What is vertical angles
300

This congruence postulate states that 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

300
The two sides of a right triangle that form the 90 degree angle.
What are the legs
300

This type of triangle has three congruent angles.

What is Equiangular.

400

This type of triangle has an angle whose measurement is greater than 90 degrees.

What is Obtuse

400

The measure, in degrees, of an angle marked with a little box.

What is 90 degrees.

400

This congruence postulate states that if two angles and the non-included side one triangle are congruent to two angles and the non-included side of another triangle, then these two triangles are congruent.

What is AAS

400
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
400

This is the name for the non-congruent side of an isosceles triangle.

What is the base

500

In this type of triangle, all angles measure less than 90 degrees.

What is acute.

500

The exterior angle of a triangle is equal to the sum of these.

What are the opposite interior angles.

500

This postulate states that if two triangles are congruent, all of their corresponding angles and sides are also congruent.

What is CPCTC

500

In addition to the right angle, you need this number of sides to prove a right triangle congruent.

What is two

500

This is the point where two congruent legs come together in an isosceles triangle.

What is Vertex Angle