Question 650022
You can classify an angle x in one of three ways:

i) acute  x<90
ii) right x = 90
iii) obtuse x>90

Given that, let's answer your questions:

1) 24.  24<90 so acute
2) 98 > 90 so obtuse
3) 126 > 90 so obtuse
4) 90=90 so right