A triangle in which all three sides are congruent.
What is an equilateral triangle.
100
Two lines that never cross each other and lie in the same plane.
What are parallel lines.
100
SSS stands for this.
What is side-side-side?
100
An triangle in which two sides are congruent.
What is isosceles?
200
An angle with a measure of 180 degrees.
What is a straight angle.
200
A triangle in which at least two sides are congruent.
What is an isosceles triangle.
200
The line that crosses two parallel lines.
What is a transversal.
200
The "A" in ASA and AAS stands for this.
What is angle?
200
The name for the two congruent sides of an isosceles triangle.
What are legs?
300
The angle that is formed by two perpendicular lines.
What is a right angle.
300
A triangle with one 90 degree angle.
What is a right triangle.
300
The angles that are in the same position with respect to the transversal crossing two parallel lines.
What is corresponding angles.
300
Which two postulate have two angles in their names?
What are the ASA and AAS Postulates?
300
The name for the two congruent angles of an isosceles triangle.
What are base angles?
400
Two adjacent angles that add up to 180 degrees.
What is a linear pair.
400
A triangle in which one angle is over 90 degrees.
What is an obtuse triangle.
400
The measures of any two alternate interior angles formed by parallel lines and a transversal are always this.
What is congruent.
400
The HL property is used with this type of triangle.
What is a right triangle?
400
The measure of each angle of an equilateral triangle.
What is 60 degrees?
500
The two angles that are across from each other when two lines cross.
What is vertical angles.
500
The two acute angles of a right triangle always have this sum.
What is 90 degrees.
500
The measures of any two consecutive interior angles when two parallel lines are crossed by a transversal.
What is supplementary.
500
Because the "H" and the "L" have a right angle between them, two triangles proven congruent with the HL postulate can also be proven congruent with this postulate.
What is the SAS Postulate?
500
By their definitions, an equilateral triangle can also be called this.