Plz Check My Geometry
posted by Ariel .
Out of 30 questions these few I struggled with. I put what I feel was right but to be sure I would like some one to check my answers and if there wrong redirect me on how to get the correct answer.( after the = is the answer i think it is.
1.) Given points A(4, 5), B(2, 3), C(0, 4) and D(5, 0), decide if AB and CD are parallel, perpendicular or neither.
=Neither
2.)Given the equations y = 1x + 7 and y = 3x  2, decide whether the lines are parallel, perpendicular or neither.
=neither
3.) Given the equations y = 4/3x  3 and y = 3/4x + 2, decide whether the lines are parallel, perpendicular, or neither.
=Perpendicular
4.) Which set of points are collinear?{options being A(1,5); B(2,6); C(4,7), A(0,0); B(1/2,3); C(1,5), A(4,2); B(0,4); C(2,5)
= A(4,2); B(0,4); C(2,5)
5.) Choose whether the lines given below are parallel, perpendicular or neither.4x  6y = 9; 3y  2x = 7j
= neither
6.) Choose whether the lines given below are parallel, perpendicular or neither.
4x  6y = 9; 4y + 6x = 12
=perpendicular
7.) Choose whether the lines given below are parallel, perpendicular or neither.4x  6y = 9; 3x  2y = 11
=neither
8.) Triangle Î”ABC has vertices A(2,5), B(8,1) and C(2,1) and is a right triangle. If the slope of AB is 2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?
=perpendicular

I caught #5
first equation : 4x  6y = 9
multiply 2nd by 2 > 4x  6y = 14j
what do you think now? 
perpendicular

no, aren't their slopes equal ??
4x  6y = ?????
the slope is 2/3, the constant on the right side does not matter. 
oh ok

Choose whether the lines given below are parallel, perpendicular or neither.

Determine whether the lines are perpendicular, parallel or neither.
x+2y= 2
2x4y= 3
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