Angles
All the angles congruent to angle 8 in the diagram.
What are angles 2, 6, and 4?
It's how we know the triangles in the image are congruent.
What is ASA?
The name for a ten sided figure.
The intersection of altitudes of a triangle.
What is the orthocenter?
This segment connects the vertex of a triangle to the midpoint of the opposite side.
The name for two angles whose sum is 180 degrees.
What are supplementary angles?
Out of ASA, SAS, AAS, SSA, SSS, and HL, it is the one that is NOT a valid congruence theorem.
What is SSA?
This is the total interior degrees of a pentagon.
What is 540? (3*180)
The intersection of medians of a triangle.
What is the centroid?
This segment connects a vertex of a triangle to the opposite side at a 90 degree angle.
What is an altitude?
The name for an angle whose measure is greater than 90 degrees.
What is obtuse?
This congruence theorem only works on right triangles.
What is hypotenuse-leg congruence?
If the angle measures of a triangle are a, 3a, and 5a, these are the measures in degrees.
What are 20 degrees, 60 degrees, and 100 degrees?
What is the circumcenter?
This segment connects the midpoints of two sides of a triangle.
What is a midsegment?
The term for angles 4 and 2 in the diagram.
What are corresponding angles?
If AB is congruent to AD, this congruence theorem will prove that triangle ABC is congruent to triangle ADC.
What is SSS congruence?
The acute angles in a right triangle are __________.
What are complementary?
The intersection of the angle bisectors of a triangle.
What is the incenter?
This is the center of the circle which has all three vertices of the triangle on the circle.
What is the circumcenter?
The name for angles 3 and 7 in the diagram.
What are alternate interior angles?
This is the additional information needed to prove the triangles are congruent by SAS.
What is WV = VM?
This is the exterior angle measurement of a regular hexagon.
What is 60 degrees? (360/6)
These points of concurrency can be outside of the triangle.
What are the orthocenter and the circumcenter?
This is the balancing point of a triangle. Connecting this point to the three vertices of a triangle will create three smaller triangles with equal area.
What is the centroid?