Difference between revisions of "1964 AHSME Problems/Problem 39"

(See Also)
Line 36: Line 36:
 
{{AHSME 40p box|year=1964|num-b=38|num-a=40}}
 
{{AHSME 40p box|year=1964|num-b=38|num-a=40}}
  
[[Category:Introductory Algebra Problems]]
+
[[Category:Introductory Geometry Problems]]
  
 
{{MAA Notice}}
 
{{MAA Notice}}

Revision as of 22:22, 24 July 2019

Problem

The magnitudes of the sides of triangle $ABC$ are $a$, $b$, and $c$, as shown, with $c\le b\le a$. Through interior point $P$ and the vertices $A$, $B$, $C$, lines are drawn meeting the opposite sides in $A'$, $B'$, $C'$, respectively. Let $s=AA'+BB'+CC'$. Then, for all positions of point $P$, $s$ is less than:

$\textbf{(A) }2a+b\qquad\textbf{(B) }2a+c\qquad\textbf{(C) }2b+c\qquad\textbf{(D) }a+2b\qquad \textbf{(E) }$ $a+b+c$


[asy] import math;  pair A = (0,0), B = (1,3), C = (5,0), P = (1.5,1);  pair X = extension(B,C,A,P), Y = extension(A,C,B,P), Z = extension(A,B,C,P);  draw(A--B--C--cycle); draw(A--X); draw(B--Y); draw(C--Z); dot(P); dot(A); dot(B); dot(C); label("$A$",A,dir(210)); label("$B$",B,dir(90)); label("$C$",C,dir(-30)); label("$A'$",X,dir(-100)); label("$B'$",Y,dir(65)); label("$C'$",Z,dir(20)); label("$P$",P,dir(70)); label("$a$",X,dir(80)); label("$b$",Y,dir(-90)); label("$c$",Z,dir(110)); [/asy]

See Also

1964 AHSC (ProblemsAnswer KeyResources)
Preceded by
Problem 38
Followed by
Problem 40
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
All AHSME Problems and Solutions

The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. AMC logo.png