Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Fagnano's Problem

Author:Lamberto Lamberti
Topic:Perimeter
To inscribe in a given acute-angle triangle the triangle of a minimum perimeter. http://www.cut-the-knot.org/triangle/Fagnano.shtml

New Resources

  • Linear Equation Graphs: Thin Slice
  • Slope Illustrator (2)
  • 挂谷问题——三尖瓣形
  • Quadrant Illustrator
  • Absolute Value Functions f(x)=a |x - h| + k

Discover Resources

  • CCSS IP Math I 2.8.1 Example 3
  • Construct a square
  • Vector Addition of Two Vectors - 2
  • Distance formula
  • Unit 1 Lesson Book: AREA

Discover Topics

  • Triangles
  • Equations
  • Addition
  • Dilation
  • Median Line
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®