Help pleaseee.The answer has to be 50,40, or 90

Answer:
40
Step-by-step explanation:
We know that angle FGE is equal to 50 and angle GEC is equal to 90 degrees because of the square. Therefore, we add them together. 50+90=140. We know that a triangle is equal to 180 degrees so we have to subtract 140 from 180. 180-140 is equal to 40. Therefore, angle FCE is equal to 40.
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Answer:
<FCE = 40
Step-by-step explanation:
The sum of angles in a triangle is (180) degrees. This holds true for the given triangle. Therefore, one can form an equation,
<FGE + <FCE + <GEC = 180
Substitute,
50 + <FCE + 90 = 180
(Note that a box around an angle indicates that the angle measure is (90) degrees)
Simplify,
140 + m<FCE = 180
Inverse operations,
140 + <FCE = 180
<FCE = 40