What is the value of t on the truss of the bridge?

Answer:
Step-by-step explanation:
t° + 55° = 90° (Exterior angle of a triangle is equal to the sum of the opposite interior angles.)
[tex] {t}^{o} + {55}^{o} = {90}^{o} \\ {t}^{o} = {90}^{o} - {55}^{o} \\ {t}^{o} = {35}^{o} \\ [/tex]