MathDB

24

Part of 2019 MIG

Problems(1)

2019 Individual #24

Source:

5/1/2022
Regular hexagon ABCDEFABCDEF has area 11. Starting with edge ABAB and moving clockwise, a new point is drawn exactly one half of the way along each side of the hexagon. For example, on side ABAB, the new point, GG, is drawn so AG=12ABAG = \tfrac12 AB. This forms hexagon GHIJKLGHIJKL, as shown. What is the area of this new hexagon? [asy] size(120); pair A = (-1/2, sqrt(3)/2); pair B = (1/2, sqrt(3)/2); pair C = (1,0); pair D = (1/2, -sqrt(3)/2); pair EE = (-1/2, -sqrt(3)/2); pair F = (-1,0); pair G = (A+B)/2; pair H = (B+C)/2; pair I = (C+D)/2; pair J = (D+EE)/2; pair K = (EE+F)/2; pair L = (F+A)/2; draw(A--B--C--D--EE--F--cycle); draw(G--H--I--J--K--L--cycle); dot(A^^B^^C^^D^^EE^^F^^G^^H^^I^^J^^K^^L); label("AA",A,NW); label("BB",B,NE); label("CC",C,E); label("DD",D,SE); label("EE",EE,SW); label("FF",F,W); label("GG",G,N); label("HH",H,NE); label("II",I,SE); label("JJ",J,S); label("KK",K,SW); label("LL",L,NW); [/asy] <spanclass=latexbold>(A)</span>35<spanclass=latexbold>(B)</span>57<spanclass=latexbold>(C)</span>34<spanclass=latexbold>(D)</span>79<spanclass=latexbold>(E)</span>45<span class='latex-bold'>(A) </span>\dfrac35\qquad<span class='latex-bold'>(B) </span>\dfrac57\qquad<span class='latex-bold'>(C) </span>\dfrac34\qquad<span class='latex-bold'>(D) </span>\dfrac79\qquad<span class='latex-bold'>(E) </span>\dfrac45
2019 Individual