# Triangle Altitude Illustrator and Definition Writing Prompt

- Author:
- Tim Brzezinski

- Topic:
- Triangles

Interact with the applet for a few minutes.
The

**purple segment**that will appear is said to be an**ALTITUDE OF A TRIANGLE.**Be sure to move the**blue vertex**of the triangle around a bit as well. Answer the questions that appear below the applet.## 1.

Is it ever possible for a triangle's **altitude** to lie **inside the triangle**?

## 2.

Is it ever possible for a triangle's **altitude** to lie ON the triangle itself?
That is, can an **altitude** of a triangle **ever be the same as ONE SIDE of the triangle**?
If so, in what kind of a triangle will this occur?

## 3.

Is it ever possible for a triangle's **altitude** to lie** entirely OUTSIDE the triangle**?

## 4.

Given your responses to these question and what you've observed, complete the following sentence definition (without looking it up on another tab in your browser):
*An altitude of a triangle is...*