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Definition: What is an auxiliary line?
An extra line needed to complete a proof, represented as a dashed line.
How would you state in a proof that you decided to use an auxiliary line?
By stating:"Draw a line from point _ to point _", then using the postulate "two points make a segment" as your reason.
What is the definition of CPCTC?
Corresponding Part of Congruent Triangles are Congruent
FLIP CARD OVER FIRST TIME
Answer:
AE is the median of △ABC
AD is the altitude of △ABC
In △ABC: D and E are points on BC such that BE=CE, and AD ⊥ BC. What can you conclude?
If the base of a triangle is equal to the altitude, what would be true for the area? (let x be equal to the base)
The area would be 1/2(x)^2, because x is always being multiplied by itself
At what point could you use CPCTC in a proof?
Only after you have proved at least 2 triangles congruent in the steps before that
What kind of angle is formed with an altitude?
90° or a Right Angle
What does the MEDIAN do?
Bisects the segment opposite of any vertex on a triangle. (3 medians total)
Note 
Flashcard (91)