TITLE: Splitting equilateral triangle into 5 equal parts
QUESTION [15 upvotes]: Is it possible to divide an equilateral triangle into 5 equal (i.e., obtainable
from each other by a rigid motion) parts?

REPLY [19 votes]: The answer is "yes", it is possible to divide equilateral triangle into $5$ equal parts, see the picture below which comes from here: https://ru-math.livejournal.com/831851.html