Congruent Lines

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Congruent Lines

• 4-8

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Definitions

• Concurrent when three or more lines intersect
  in one point
• Point of Concurrency the point at which all
  three lines meet
• Median of a triangle segment whose endpoints
  are a vertex and the midpoint of a side opposite
  the vertex
• Altitude of a triangle perpendicular segment
  from a vertex to the line containing the side
  opposite the vertex

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Theorem 4-16

• The perpendicular bisectors of the sides of a
  triangle are concurrent at a point equidistant
  from the vertices.

Point of Concurrency
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Theorem 4-17

• The bisectors of the angles of a triangle are
  concurrent at a point equidistant from the sides

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Theorem 4-19

• The medians of a triangle are concurrrent

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Homework

• Be sure to look through the books examples from
  page 227-230
• YOU HAVE TIME!!!
• P. 230 1-25