Given the following diagram, if m ∠ cof = 150°, then m ∠ boc = ad ⊥ bf

150 °
90 °
45 °
30 °

These question are hard can you me with answers

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

What are the values of each variable in the diagram below?