Answer the following questions. Encircle the letter of the correct answer

6. Which angle measures 90 degrees and forms a square corner?
A. acute angle
C. right angle
B. obtuse angle
D. straight angle

7. Which angle measures less than 90 degrees and smaller than a right angle?
A. acute angle
C. right angle
B. obtuse angle
D. straight angle

8. Which angle measures more than 90 degrees?
A. acute angle
C. right angle
B. obtuse angle
D. straight angle

9. Which of the following is a measure of an obtuse angle?
A. 70°
B.90°
C.120°
D. 180°​