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Lines and Angles

Author:
Duane Habecker
Topic:
Angles, Straight Lines
A series of applets about lines and angles for 10 to 12 year old students.

  • Basic Geometric Objects and definitions

  • Types of angles

  • Animated acute angles

  • Animated view of right angles.

  • Animated view of obtuse angles.

  • Animated view of straight angles.

  • Animated view of reflex angles.

  • Protractor Practice (Not Random)

  • Protractor Practice (Random)

  • Sum of angles in polygons

  • Angles in a 5-pointed star

  • Sum of interior angles in a triangle

  • Sum of the angles in a triangle

  • Missing angle in a triangle

  • Definition of complementary angles

  • Missing complementary angle

  • Supplementary angles

  • Missing supplementary angle

  • Vertical angles

  • Triangle on a line with missing angles

  • Angles on a line

  • Broken Protractor

Next
Basic Geometric Objects and definitions

Related Topics

  • Congruence
  • Conic Sections
  • Constructions
  • Coordinates
  • Fractal Geometry

Discover Resources

  • Always a parallelogram
  • basketball
  • spiral
  • Build Your Own Right Triangular Prism (V2)!
  • Demo: using Sort(list of points)

Discover Topics

  • Centroid or Barycenter
  • Pythagoras or Pythagorean Theorem
  • General Quadrilateral
  • Trapezium
  • Standard Deviation

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