What is the perimeter of the triangle with coordinates (-6,3) (-1,-1) (-1, 3)

Question

The Triangle is D (-6, 3)E (-1,1), F (-1,3).

Answer 1

It helps to draw a picture when you don't see the patterns in the coordinates.

 

http://hwmath.net/solutions/triDEF.jpg

 

The perimeter of the triangle is the distance from D to F plus the distance from F to E and the distance from E to D.

 

What type of triangles is shown?

How can you calculate the distance from E to D?