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Geometry Ch 3-4

  1. The figure formed by 3 segments joining 3 noncollinear points
    definition of a triangle
  2. What type of triangle is this?
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    Scalene
  3. What type of triangle is this?
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    isosceles
  4. What type of triangle is this?
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    • equilateral
    • sides are equal.
  5. isosceles triangles are ________ equilateral.
    sometimes
  6. equilateral triangles are ________ isosceles.
    always
  7. What type of traingle is this?
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    acute
  8. What type of triangle is this?
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    obtuse
  9. What type of triangle is this?
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    right
  10. What type of triangle is this?
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    • equiangular
    • angles are equal.
  11. What theorem proves this angle to be 100?
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    the sum of the measures of the interior angles of any triangle is 180.
  12. What theorem proves that angle 1 is congruent to angle 2 plus angle 3?
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    the measure of the exterior angle of a triangle equals the sum of the measures of its 2 remote interior angles.
  13. What are remote interior angles?
    the angles away from a particular angle.
  14. Name the corollary that proves the following:
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    if two angles of one triangle are congruent to 2 angles of another, then the third angles are congruent.
  15. Name the corollary that proves the following:
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    each angle of an equiangular triangle has a measure of 60.
  16. Name the corollary that proves the following:
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    in a triangle, there can be at most one right angle or one obtuse angle.
  17. Name the corollary that proves the following:
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    the acute angles of a right triangle are complementary
Author
Anonymous
ID
110364
Card Set
Geometry Ch 3-4
Description
Triangles
Updated

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