Triangle abc is isosceles what is true about the measure of angle b

See attachment below and find the equivalent of tan(∠qsr)

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

How far does the wijw nj jh jevh dhhb vte hbhe gvbf5wf bjehn v