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User MightyWOZ
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The value of angle EDF is 51.5°

An isosceles triangle is a type of triangle that has at least two equal sides and two equal corresponding angles.

The sign shown on the triangle shows that angle EDF = angle EFD

The sum of angle in a triangle is 180°

represent angle EDF by x

therefore:

x + x + 77 = 180

2x = 180 - 77

2x = 103

x = 103/2

x = 51.5

Therefore, the value of angle EDF is 51.5°

User Quora Feans
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