If three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent.
What is SSS
100
Angle A measures 80°, angle B measures 60°, and angle C measures 40°. The shortest side is opposite this angle.
What is angle C?
100
The type of triangle for which the orthocenter, incenter, centroid, and circumcenter are all the same point.
What is an Equilateral Triangle?
200
At least two congruent sides
What is Isosceles
200
The value of all three angles in a triangle added together.
What is 180 degrees
200
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
Two sides of a triangle are length 3 and 5, and so the third side must lie between these numbers.
What are 2 and 8?
200
These four rays/segments/lines from the vertex angle of an isosceles triangle are all collinear.
What are angle bisector, perpendicular bisector, median, and altitude?
300
All sides are congruent.
What is Equilateral
300
When two lines intersect the opposite angles are equal to each other.
What is vertical angles
300
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 measures of the three angles of an isosceles right triangle.
What are 45°, 45°, and 90°?
300
The base angle in an isosceles triangle if the vertex angle is 100°.
What is 40°?
400
Has an angle whose measurement is greater than 90 degrees.
What is Obtuse
400
The little box in the corner of a triangle.
What is 90 degrees.
400
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
400
CPCTC stands for this.
What is Corresponding Parts in Congruent Triangles are Congruent?
400
The vertex angle in an isosceles triangle if a base angle is 25°.
What is 130°?
500
All angles measure less then 90 degrees.
What is acute.
500
An exterior angle of a triangle is equal to this.
What is the sum of the opposite interior angles?
500
If the hypotenuse and a leg of one right triangle are congruent to the hypotenuse and leg of another right triangle, the the triangles are congruent.
What is HL?
500
The median of a triangle splits this into two congruent parts.
What is the side opposite the vertex from which the median is drawn?