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

© 2021 GeoGebra

Which quadrilaterals are parallelograms?

Author:
Emma Haddad
Topic:
Parallelogram, Quadrilaterals
A parallelogram has two pairs of opposite sides that are parallel. Parallel means the slopes are the same.
Drag the vertices of the three quadrilaterals and observe what happens to the slopes. Is each one always, sometimes, or never a parallelogram?

Related Topics

  • Area
  • Circle
  • Perimeter
  • Polygons
  • Special Points

Discover Resources

  • Point in an Equilateral Triangle
  • Reverse&Sub42
  • Recta Tangente a una Circunferencia en un punto en ella
  • Triangle Angles Exploration
  • Triangle Similarity Investigation 3

Discover Topics

  • Rhombus
  • Division
  • Addition
  • Dilation
  • Function Graph

GeoGebra

  • About
  • Partners
  • Testing
  • News Feed
  • App Downloads

Apps

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

Resources

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