SOLUTION: (picture of the problem) https://imgur.com/pci4KhW Complete the list of missing values below, Given: AB is congruent to BF, CB is congruent to CF, triangle DEF is equilateral, a

Question 1093090: (picture of the problem) https://imgur.com/pci4KhW
Complete the list of missing values below, Given: AB is congruent to BF, CB is congruent to CF, triangle DEF is equilateral, and = 40deg.
(same as first link but only the triangle) https://imgur.com/4b3QvKW

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
If E is the unnamed vertex at the right, then DFE is 60 degrees, because it is an equilateral triangle.
DFE and BFD together are 100 degrees, 60+40, and therefore BFA is 80 degrees. That makes ABF 20 degrees, because the two angles of an isosceles triangle that are equal comprise 160 degrees.
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