CONGRUENT TRIANGLES
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4 Terms
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Two polygons are congruent…
if and only if their vertices can be matched up so that their corresponding parts are congruent
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With congruent triangles FIN and WEB, it would be incorrect to say triangles INF and EWB are congruent because…
corresponding parts no longer align
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Biconditional: A line and a plane are perpendicular…
if and only if 1) they intersect and 2) the line is perpendicular to all lines in the plane that pass through the point of intersection
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ITT Corollaries:
An equilateral triangle is also equiangular.
An equilateral triangle has three 60 degree angles.
The bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint.
Note 
Flashcards (30)