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Geometry Reflective Portfolio
Unit #6: Triangle congruence
At the conclusion of each unit, you will create a one page study sheet.
You must write the title of the unit and its number.
All future study sheets will need to have the same sections!
Section #1: Vocabulary (words and/or diagrams)
Define each:
Triangle classifications:
Angles:
Sides:
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Acute triangle
Obtuse triangle
Right triangle
Equiangular
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Angle bisector
Midpoint
Line segment bisector
Perpendicular lines
Altitude
Median
Vertical angles
Supplementary angles
Linear pair of angles
Complementary angles
Vertex angle of an isosceles triangle
Base angles of an isosceles triangle
Equilateral triangle
Isosceles triangle
Scalene triangle
Section #2: Formulas/Equations/Theorems
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Write out the Triangle interior angle sum theorem:
Triangle Exterior angle Theorems
 The sum of the measures of an exterior angle and its adjacent interior
angle is __________.
 The sum of the measures of all 3 exterior angles is______.
 The measure of an exterior angle of a triangle is equal
to___________________________________________________________.
Write out the Triangle inequality theorem:
In a triangle, the largest angle is across from the__________________________
Ina triangle, the shortest side is across from the __________________________
Section #3: Key methods and concepts (write out the process and/or a solved
example)
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Write the 4 theorems that prove 2 triangles are congruent:
Write a 2 column proof for:
Given: QS  PR and QS bisects PQR
Prove: PQS  RQS