Difference between revisions of "2000 AMC 10 Problems/Problem 7"
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Revision as of 16:25, 29 April 2018
Problem
In rectangle 
, 
, 
is on 
, and 
and 
trisect 
. What is the perimeter of 
?
![[asy] draw((0,2)--(3.4,2)--(3.4,0)--(0,0)--cycle); draw((0,0)--(1.3,2)); draw((0,0)--(3.4,2)); dot((0,0)); dot((0,2)); dot((3.4,2)); dot((3.4,0)); dot((1.3,2)); label("$A$",(0,2),NW); label("$B$",(3.4,2),NE); label("$C$",(3.4,0),SE); label("$D$",(0,0),SW); label("$P$",(1.3,2),N); [/asy]](http://latex.artofproblemsolving.com/1/0/a/10ad0d6c91539b40c085057a166894ac1cede67f.png)
![[asy] draw((0,2)--(3.4,2)--(3.4,0)--(0,0)--cycle); draw((0,0)--(1.3,2)); draw((0,0)--(3.4,2)); dot((0,0)); dot((0,2)); dot((3.4,2)); dot((3.4,0)); dot((1.3,2)); label("$A$",(0,2),NW); label("$B$",(3.4,2),NE); label("$C$",(3.4,0),SE); label("$D$",(0,0),SW); label("$P$",(1.3,2),N); label("$1$",(0,1),W); label("$2$",(1.7,1),SE); label("$\frac{\sqrt{3}}{3}$",(0.65,2),N); label("$\frac{2\sqrt{3}}{3}$",(0.85,1),NW); label("$\frac{2\sqrt{3}}{3}$",(2.35,2),N); [/asy]](http://latex.artofproblemsolving.com/1/7/3/1737e5821bacb07d0b3db7b58188aac7078aaff2.png)
.
Since is trisected, 
.
Thus, 
.
Adding, we get 
