Triangle Explorations --Interactive Applets

Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.	Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.	Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.
A Triangle Sheer... Drag the red point. How is the area of the triangle affected? (The red line is parallel to the base.)	Variable height triangle with fixed base. Do 3 Points always determine a triangle?	Heron's Formula for triangle area, T=(s(s-a)(s-b)(s-c))^½ where s=P/2 =½(a+b+c), is half the perimeter.
Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.	Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.	Sorry, your Web browser is not Java compatible. This prototype will not be of much interest to you.
The centroid is the intersection of the medians. (The *center of mass* of homogeneous material)	The orthocenter is the intersection of the altitudes.	The circumcenter is the intersection of the perpendicular bisectors of the sides. See circle.


Geometree	Angles	Objects	Triangles	Graphs