I'll go out on a limb here, make a possibly unwarranted assumption, rush in with
no concern for my personal welfare to a place where angels fear to tread, and
presume that you're talking about the angle formed by the hour- and minute hands
of an old fashioned clock.
On that assumption, I count eleven (11) of them.
2
90 degree angle
44. 22 in each 12 hour cyccle.
22 times in a day.
24 times
18
2
11 times.
18 times
90 degree angle
An angle whose measure is two times 90 degrees is a 180 degree angle, which is also a straight angle.
44. 22 in each 12 hour cyccle.
22 times in a day.
Use Protractor Three Times
24 times
22 times.
A = 18.1 degrees B = 54.3 degrees C = 107.6 degrees