GeoGebra
  • Create Lesson
GeoGebra
  • Home
  • News Feed
  • Resources
  • Profile
  • People
  • Classroom
  • App Downloads
About GeoGebra
Contact us: office@geogebra.org
Terms of Service – Privacy – License

© 2022 GeoGebra

Measuring and constructing angles

Author:
Monique Goodwin, Tim Brzezinski
Topic:
Angles

Watch the following video that briefly and successfully explains complementary angles.

Complementary angles - slide the pink dot along the line to adjust the size of each angle. Use a protractor to measure each angle. Add the two angle sizes together to find the combinations of 90 degrees (complementary angles). Slide the black dot to obser

New Resources

  • GCD of Three Numbers (Practice Exercise)
  • Open Middle: Perimeter of a Rectangle
  • Tutorial RDWorks para iniciantes (em inglês)
  • Factors of Positive Integers
  • Open Middle: Horizontal and Vertical Distances (V1)

Discover Resources

  • cp Geometry opposite sides congruent 2
  • Warmup2.04
  • Polar Linkage Explorer
  • Epicycloid 1
  • Lineare_Funktion

Discover Topics

  • Trapezoid
  • Means
  • Percentages
  • Geometric Distribution
  • Tangent Line or Tangent

GeoGebra

  • About
  • Partners
  • GeoGebra on Tests
  • News Feed
  • App Downloads

Apps

  • Calculator Suite
  • Graphing Calculator
  • 3D Calculator
  • CAS Calculator
  • Scientific Calculator

Resources

  • Classroom Resources
  • Learn GeoGebra
  • Classroom
  • Geometry
  • Notes
  • Terms of Service Privacy License
  • Facebook Twitter YouTube