NEED HELP

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

Question

NEED HELP

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

april115 · Answer

can u remind me what perpendicular means?

anonymous · Answer

@april115 A straight line at an angle of 90° to a given line, plane, or surface

april115 · Answer

oh thanks. if im not mistaken i think the answer is D. hope that helps 
@Robb828

april115 · Answer

=]

anonymous · Answer

ok thank you :)

april115 · Answer

Your Welcome. :)