The Triangle Inequality Theorem states this.
What is the sum of the lengths of any 2 sides of a triangle is greater than the length of the 3rd side?
The first step of an indirect proof is this.
What is to assume the opposite of the conclusion is true?
The Pythagorean Theorem Converse for an acute triangle is this.
What is c^2 < a^2 + b^2?
The Third Angles Theorem states this.
What is if 2 angles of one triangle are congruent to 2 angles of another triangle, then the third angles are congruent?
The simplified radical of the square root of 72 is this.
What is 6 times the square root of 2?
CPCTC is an acronym for this.
What is Congruent Parts of Congruent Triangles are Congruent?
The Exterior angle Theorem states this.
What is the measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent (remote) interior angles?