Points A (9, 9), B (13, 17), C (21, 13), and D (17, 5) are plotted on a coordinate grid. Which statement is correct?
Answer
AB is perpendicular to CD and BC is perpendicular to AD.
AC and BD are the diagonals of square ABCD because AB = BC = CD = AD.
AC is not perpendicular to BD because the lengths of AB, BC, CD, and AD are different.
BD does not bisect angle ABC because each interior angle of figure ABCD measures less than 90°.

Question

Points A (9, 9), B (13, 17), C (21, 13), and D (17, 5) are plotted on a coordinate grid. Which statement is correct?
Answer
		AB is perpendicular to CD and BC is perpendicular to AD.
		AC and BD are the diagonals of square ABCD because AB = BC = CD = AD.
		AC is not perpendicular to BD because the lengths of AB, BC, CD, and AD are different.
		BD does not bisect angle ABC because each interior angle of figure ABCD measures less than 90°.