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Mathematics 9 Online
OpenStudy (anonymous):

1)ABC is an equilateral triangle with sides that are 18 inches. Point D is at a distance of 5 inches from point A. Angles ADE and DEF are right angles. a)Using a straightedge, draw DF. b)Find the length of DF. Show your work and explain yourself. c)Find the area of triangle ABC. Show work and explain.

OpenStudy (anonymous):

picture of triangle in file

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