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8. Given the figure at the right, if LABC = 909, which of the following statements is TRUE?
A. LABC is an acute angle.
B. LABC is a right angle.
C. ZABC is an obtuse angle.
D. LABC has no known classification.

9. Which of the following is a measure of an acute angle?
A. 1700 degree
B. 1500 degree
C. 90 degree
D. 80 degree

10. If mZMAT = 135º and m_HAE = 450, then which of the following could describe the two angles?
A. complementary angles
B. vertical angles
C. supplementary angles
D. forms a right angle​