Respuesta :

Hello there!
Angle <AB is a perfect 90° angle. Same goes for angle <BC.
Hope I helped!

calculista

Answer:

[tex]arc\ AB=90\°[/tex]

Step-by-step explanation:

we know that

In this problem

The measure of the arc AB is equal to the measure of angle APB, by central angle

so

[tex]arc\ AB=m<APB[/tex] ------> by central angle

we have

[tex]m<APB=90\°[/tex] ------> because is a right angle

therefore

[tex]arc\ AB=90\°[/tex]