Posted by **jasmine** on Thursday, December 8, 2011 at 11:57am.

7. Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6), C(–1, 5), and D(3, –2) is a rhombus by showing that it is a parallelogram with perpendicular diagonals.

- geometry -
**Reiny**, Thursday, December 8, 2011 at 12:02pm
easy,

after making sketch, show that the slopes of opposite sides are equal.

Then draw the diagonals and find their slopes

show that the slope of one diagonal is the opposite reciprocal of the slope of the other.

Be careful in your slope calculations with the subtraction of all those negative numbers

I will do one slope

slope AB = (6-(-1))/(-9 - (-5)) = 7/-4 or -7/4

- geometry -
**bob**, Saturday, January 19, 2013 at 8:18pm
do ur own homework

## Answer this Question

## Related Questions

- geometry - Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6), C(–...
- help asap - 7. Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6...
- geometry - Given: QRST is a parallelogram. Prove: QRST is a square. Complete ...
- Geometry - Write a proof. 1. Prove: If the diagonals of a parallelogram are ...
- geometry theorems - I have six questions which will be on a test two weeks from ...
- Geometry - Given: ABCD is a parallelogram; <1 is congruent to <2 To Prove...
- Geometry - 8)Suppose that a given parallelogram is not a rhombus or a rectangle...
- Geometry - I really need some help please!!!!! Am I on the right tract? Given: ...
- math - Suppose that a given parallelogram is not a rhombus or a rectangle. Which...
- Geometry - Can some one please check these for me.Thanks Angle DEF is similar to...