56°
101°
Find the value of the missing angle a.

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¯¯¯¯¯¯¯¯)?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Which of the following best describes the delian problem?