Three segments

The circle is divided into 3 segments. Segment A occupies 1/4 of the area, segment B occupies 1/3 of the area. What part is occupied by section C? In what proportion are areas A: B: C?

Result

C =  0.417
r = (Correct answer is: 3:4:5) Wrong answer

Solution:

Solution in text C =
Solution in text r =

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