Thursday, December 14, 2006
Geometry (Class 36)
Overview
§5.3 Medians and Altitudes of a Triangle
In this class we continue our work with the altitudes of triangles using them to calculate area as well as examining the intersection of the altitudes of a triangle.
Key Attitudes
Mathematics can be a tool for investigating and uncovering facts.
Investigating requires creativity and persistence.
If you don’t first succeed, try, try again.
Key Ideas
The altitudes of a triangle are concurrent.
The point of concurency of the altitudes of a triangle is called the orthocenter.
Sometimes the orthocenter of a triangle is inside the triangle, sometimes it is on the triangle, and sometimes it is exterior to the triangle.
Key Skills
Constructing a perpendicular line passing through a point not on the line.
Constructing the orthocenter of a triangle.
Plotting points on a coordinate graph.
Vocabulary
Orthocenter
Assignment
Chapter 5 Review Page 2
Lesson 5.3 Practice B #1-10
Balance the Triangle Part 4
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