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Coordinating Geometry

 
 
Reply Thu 4 Jun, 2009 02:12 pm
Coordinating Geometry?
I need help figuring these questions out badly! I always get these types of question's wrong on test's and work sheet's! so if someone can help me understand then I would appreciate it alot!

Question 1:
A triangle is considered a right triangle if two of its legs are perpendicular to each other. Below is the graph of three lines that form a triangle.

http://i40.tinypic.com/262qoad.gif <<<< graph

Part 1: Find the slopes of all three legs of the triangle shown.

Part 2: Are any of the legs perpendicular to each other? If so, which ones and how do you know? Make sure to use complete sentences and correct grammar.


Question 2:
The height of a triangle can be found by drawing a perpendicular line from a vertex to a base. A triangle, along with its height, is shown on the graph below.

http://i39.tinypic.com/24oaufn.gif <<<<<< graph

Part 1: Find the slopes of the lines representing the height and the base shown.

Part 2: Is the height shown the true height of the triangle? How do you know? Make sure to use complete sentences and correct grammar.
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Setanta
 
  1  
Reply Thu 4 Jun, 2009 02:27 pm
Yes.

Not in nations of the European Union.
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fresco
 
  1  
Reply Thu 4 Jun, 2009 03:03 pm
@anthony9915,
1 part 1.
Slope of a line between two points
= difference in y cordinates/difference in x cordinates.

1 part 2.
If Line1 is perpendicular to Line2
then (slope Line1) x (slope Line2) =-1

Use these facts in Q2.
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