Posted by **ana** on Wednesday, March 31, 2010 at 5:50pm.

The sides of a parallelogram are 15 ft and 17 ft. One angle is 40° while another angle is 140°. Find the lengths of the diagonals of the parallelogram (to the nearest tenth of a foot)

- math -
**Reiny**, Wednesday, March 31, 2010 at 5:55pm
for the long diagonal

LD^2 = 15^2 + 17^2 - 2(15)(17)cos140°

solve for LD

let me know what your equation is for the short diagonal.

- math -
**Anonymous**, Monday, April 25, 2016 at 11:11pm
one side of a parallelogram is 10 inches long and makes angle 45 and 60 with short diagonal and the other side respectively. Find the length of the other side.?

## Answer This Question

## Related Questions

- Trig - The diagonals of a parallelogram intersect at a 42◦ angle and have ...
- Math - A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. ...
- math - THe area of a parallelogram is 594, and the lengths of its sides are 32 ...
- trig - The lengths of 2 adjacent sides of a parallelogram are 42 cm and 36cm. an...
- geometry theorems - I have six questions which will be on a test two weeks from ...
- Pre cal - A parallelogram has sides of lengths 7 and 4, and one angle is 55°. ...
- geometry - In parallelogram ABCD, BC = 8, DC = 12, and measure of angle D is 50 ...
- geometry - Given: QRST is a parallelogram. Prove: QRST is a square. Complete ...
- geometry - The longer diagonal of a parallelogram measures 62 cm and makes an ...
- Pre-calculus - Find the lengths of the diagonals of a parallelogram with ...

More Related Questions