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Answer:
So the value of u is [tex]24[/tex] degree.
Step-by-step explanation:
Given;
Three angle [tex]2u[/tex] , [tex](u+18)[/tex] degree and [tex]90[/tex] degree in a Triangle.
We know;
Addition of three angle in a triangle is equal [tex]180[/tex] degree
[tex]2u+u+18+90=180[/tex]
[tex]3u=180-90-18[/tex]
[tex]3u=72[/tex]
[tex]u=\frac{72}{3}[/tex]
[tex]u=24[/tex]
∴ The value of u is [tex]24[\tex] degree.