Construction: Altitudes of Triangles

About Geometry Worksheet Activity 3F:  

 

Activity 3F is an introduction to the construction of altitudes of triangles.

 

Prerequisite Skills: Identify and name altitudes of triangles (Assignment 3.16).  Construct a line through a point perpendicular to a line (Activity 2E).

 

How to construct the altitude of a triangle:

 

(Do problem 1 by following the steps below.)

 

1.  Construct a line from A that is perpendicular to line segment BC.  

 

2.  Name the point of intersection D.