[tex]x = \frac{b + a}{2} = \frac{50 + 5}{2} = \frac{55}{2} = 27.5[/tex]
[tex]xb = b - x = 50 - 27.5 = 27.5[/tex]
[tex] \frac{2}{3} xb = \frac{2}{3} (27.5) \approx18.34[/tex]
[tex]t = \frac{2}{3} ab = \frac{2}{3} (b - a) = \frac{2}{3} (45) =15 \\ [/tex]