Answer:
∴
and
this two sides include 
Step-by-step explanation:
Given;
A triangle 
We can see the figure of the triangle 
Where the
or
made by two sides
and
.
So
and
this two sides include 
For the first piece of string that is 12 feet long, he could make two 6 foot pieces. For the second piece of string that is 18 feet long he could make two 9 foot pieces. Hope I could help! :D
60 divided by 5 is 12 so it would take him 12 minutes to complete the line
If she sells 17 pet rocks She'll make $1 profit. Base cost of $50 for the table. She sells the rocks for $5 each but requires $2 per rock for packaging. Thus she makes $3 per rock she sells. 17 * 3 = 51