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## 'Trice' printed from http://nrich.maths.org/

ABCDEFGH is a 3 by 3 by 3 cube. Point P is 1/3 along AB (that is
AP : PB = 1 : 2), point Q is 1/3 along GH and point R is 1/3 along
ED.

What is the area of the triangle PQR?