Geogebra - Orthocenter
This post is a step by step guide to constructing the orthocenter of a triangle in Geogebra - an online graphing calculator. So let’s get going straight away. Orthocenter is the point where the three altitudes of a triangle intersect. So all we have to do really is draw altitudes of a triangle, and mark the location where they intersect with a dot(point). We begin by constructing any casual triangle using the Polygon tool. If you want to know how to construct a specific triangle from three known side lengths or two known side lengths & one given angle, check out this post of mine. Step 1 : Select Polygon tool by a simple left mouse click or a single tap on screen. This tool is found in the Polygons section of the shapes menu. After selecting this tool, in the graphing panel on the right, click on three different spots to mark the location of three vertices of your triangle. Click on the first point you marked again to complete the construction of a ...