# What does this mean?

• October 23rd 2008, 03:58 PM
joesmith13610
What does this mean?
A couple of my buddies are confuse to what the following means

$EF$ $:$ $FO$ $::$ $DB$ $:$ $BO$

We are looking at length of line segments. I was telling them that the colons mean that they are proportional.
What do the colons mean?
• October 23rd 2008, 04:30 PM
skeeter
Quote:

Originally Posted by joesmith13610
A couple of my buddies are confuse to what the following means

$EF$ $:$ $FO$ $::$ $DB$ $:$ $BO$

We are looking at length of line segments. I was telling them that the colons mean that they are proportional.
What do the colons mean?

EF is to FO as DB is to BO

$\frac{EF}{FO} = \frac{DB}{BO}$
• October 23rd 2008, 04:55 PM
joesmith13610
cool thanks.