Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. ICSE-ClassIX-Math
    1. 9.Triangles (congruency)

    ICSE-ClassIX-Math

    Author:Sekhar S
    ICSE Math activities of class IX https://cisce.org/UploadedFiles/PDF/12.%20ICSE%20Mathematics.pdf

    9.Triangles (congruency)

    • Triangle Sides and Angles

    • Angles opposite to equal sides (isosceles triangle)

    • Triangle Medians: Quick Investigation

    • Medians Centroid Theorem (Proof without Words)

    • Medians and Centroid Dance

    • Triangle Altitude Illustrator and Definition Writing Prompt

    • Drawing Orthocentre & Some Quiz

    • Triangle Exterior Angle

    • Polygons: Exterior Angles

    • SAS Theorem & Similarity

    • SAS: Dynamic Proof!

    • ASA Theorem?

    • gg

    Next
    Triangle Sides and Angles

    New Resources

    • z`]]
    • Slope Between 2 Points (Phase 2)
    • Fourier Lissajous (Mechanical)
    • bewijs stelling van Pythagoras
    • Damped Trochoidal Curve

    Discover Resources

    • maths
    • maths
    • Reflections-Translations Theorem 2
    • สมการเชิงเส้นสองตัวแปร
    • arc 7

    Discover Topics

    • Exponent
    • Circumcircle or Circumscribed Circle
    • Linear Equations
    • Means
    • Variance
    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®