Geometry help!! 10 points!! please help...

3. What is the length of line segment QR?
http://www.flickr.com/photos/49010532@N05/5688217388/

9.12 cm

10.36 cm

11.34 cm

12.61 cm

OK here goes

tan80=QR/RS

tan80=QR/2

QR=11.34cm

points please :-)

QR/RS = tan 80°
QR = RS tan 80° = 2 cm • tan 80° = 11.34256364... cm
QR ≈ 11.34 cm

None of the answers is correct. The closest choice is 12 cm, but that's not very close.

tangent of 80 = QR / 2 cm...
use a calculator and remember the basic sine, cosine, tangent relationships in a triangle.
good luck