Abus leaves the school traveling west at 50 miles per hours. after it travels 15 miles, a car follows the bus, traveling at 55 miles per hour. after how many hours will the car catch up with the bus? let t = time in hours, and let d = distance in miles.

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).