Some terms & definitions. Angles, angle pairs, angle measure

Duane Habecker, Zawierucha, Aug 7, 2020

A series of applets about some terms/definitions. Angle classification, angle measurement with a protractor, angle pair relationships, sum of interior angles. Interior and exterior angles of a triangle


  • 1. Basic Geometric figures - illustration & 4 questions
  • 2. Point(s), a Line, Ray(s), Segment(s), & an angle - interactive & 3 questions
  • 3. Types of angles - the 5 classifications
  • 4. Animated acute angles
  • 5. Animated view of right angles.
  • 6. Animated view of obtuse angles.
  • 7. Animated view of straight angles.
  • 8. Animated view of reflex angles.
  • 9. Protractor Practice (Random)
  • 10. "Broken" Protractor
  • 11. Protractor Practice (Not Random)
  • 12. "proof" of the triangle sum theorem
  • 13. Sum of the interior angles in a triangle is always _
  • 14. Missing angle measure in a triangle
  • 15. Sum of the interior angles of a polygon
  • 16. Definition of complementary angles
  • 17. Missing complementary angle measure
  • 18. Supplementary angles - a pair of angles whose sum is always _
  • 19. What is the measure of an angle's supplement?
  • 20. Vertical angles
  • 21. Angles on one side of a line - parts of a straight angle
  • 22. Triangle on a line with missing angles measures

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Basic Geometric figures - illustration & 4 questions

The basic figures used in plane geometry: point, line, ray, segment, and an angle.
short answer
1. With the labeling provided how many different ways can we the name the line?[br]
short answer
2. With the labeling provided how many different ways can we the name the segment?
Short answer
3. With the labeling provided how many different ways can we the name the ray as illustrated?
short question
4. With the labeling provided how many different ways can we the name the angle?
– Zawierucha, Duane Habecker

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