Orthocenter of a triangle

Applet contains a triangle with altitudes and lines containing altitudes drawn. Its purpose is to have students discover that the orthocenter of a triangle lies INSIDE the triangle IFF the triangle is acute, ON the triangle IFF the triangle is right (& at the vertex of the right angle), and OUTSIDE the triangle if the triangle is obtuse.

 

Josh Ryan

 
Resource Type
Activity
Tags
altitude  ccss  ccss.hsg.co.c.10  ccss.hsg.co.d.12  common  common-core  concurrent  core  exploration  orthocenter 
Target Group (Age)
11 – 14
Language
English
 
 
 
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