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6. Which statement can be written as a true biconditional statement? a) If a polygon is a square, then it has four equal sides. b) If an angle is a right angle, then it measures 90. c) If an angle measures 100, then it is obtuse. d) If angles measure 30 and 60, then they are complementary. 7. Which statement is the contrapositive of the statement "If a line exists then it contains at least two point a). A line exists if and only if it contains two points. b). If a line does not exist then it does not contain at least two points. c). If a line contains at least two points then it exists. d). If a line does not contain at least two points then it does not exist. 8. Which of the following statements is not true about the figure? a) ST lies in plane W. AR b ) R, Q, and V are collinear. W c ) QR and QT are opposite rays. Q R , Q, and V are coplanar . 9 Which illustration shows the correct a b construction of an angle bisector? C. d. 10. The diagram below shows the construction of the bisector of LABC. Which statement is not true? mLEBF = - mLABC a) mLDBF = - mLABC b) D C) mZEBF = mZABC a mLDBF = mLEBF