5.4 Day 2 ­ Orthocenter.notebook
December 13, 2013
1/29: Warm Up
1. Is AC a median, altitude, or neither. Explain.
2. Which altitude length can be found without
using the distance formula? What is the length?
5.4 Day 2 ­ Orthocenter.notebook
5.4 Day 2: Orthocenter
December 13, 2013
Date: 12/13
∀ The lines that contain the altitudes of a triangle are concurrent at the
orthocenter of the triangle.
∀ The orthocenter can be inside, on, or outside the triangle.
5.4 Day 2 ­ Orthocenter.notebook
December 13, 2013
Ex 1). Find the orthocenter.
What are the coordinates of the orthocenter of triangle DEF?
5.4 Day 2 ­ Orthocenter.notebook
December 13, 2013
Ex 2). What are the coordinates of the orthocenter of triangle DEF if
D(­2, ­1), E(1, 6), and F(5, ­1)?
5.4 Day 2 ­ Orthocenter.notebook
December 13, 2013
Homework:
pg. 331 #1 – 8, 14 – 18
(use provided grids for #1, 4, 5, 6)
Chapter 5 Test (Part 1) ­ Tuesday
(5.1 ­ 5.4)