The measure of an obtuse angle is a- greater than 0 and less than 90 degrees b- 90 degrees c- greater than 90 and less than 180 degrees

C. greater than 90 and less than 180 degrees.

Step-by-step explanation:

An obtuse angle is angle in the second quadrant.

This angle is more than but less than .

Therefore the correct answer is option C.

Note however that a angle is called a right angle and an angle greater than but less than is called an acute angle.