Posted by **mary** on Sunday, April 10, 2011 at 11:40am.

Rhombus ABCD has an area of 264 square units. If DB=12 units find AC.

So far this is what I have-

1/2(264)=132 132/2=66

66-12=44units

Is this the correct process?

- Geometry -
**bobpursley**, Sunday, April 10, 2011 at 11:59am
I dont follow your work.

Sketch the rhombas. One diagonal is 12, so half that diagonal is 6.

call that half b, so 2b=12

now call half the other diagonal a

so the length of that diagonal is 2a, and that is what you are looking for.

Now, the diagonals of a rhombus are perpendicular bisectors, so you have four right triangles, the area of which is

1/2 a b=264/4

or ab=132, but a=6, so a=22

which means 2a=44, so your answer is correct.

## Answer this Question

## Related Questions

- Geometry - Rombus ABCD has an area of 264 square units. If DB =12 units find AC.
- Math - Two perpendicular diamters(cutting each other at right angles) of a ...
- geometry 2 - If a rectangle has an area of 132 square units and a length of 11 ...
- geometry - If a rectangle has an area of 132 square units and a length of 11 ...
- geometry - If a rectangle has an area of 132 square units and a length of 11 ...
- geometry - Prove that if the area of a rectangular patio abcd is 25sq units and ...
- geometry - a rhombus has an area of 165 square units. Of the lenght of one of ...
- Geometry - a rhombus has an area of 165 square units. Of the lenght of one of ...
- maths - Suppose we have a chessboard (contains 64 quods). In the first quod we ...
- Math - What is the surface area in square units? top= 10 square units bottom= 10...

More Related Questions