Describe the sign changes of the coordinates for each angle. Use the following vocabulary: angle, positive, negative, coordinate, quadrant, length, height m

umm you say your want to . but you do know that this is the mathematics.  

o~o

secant-secant formula:

(whole secant) x (external part) =           (whole secant) x (external part)

(8+y-2) *8=                                           (y+4+6) *6

(y+6)*8 = (y+10) *6

distribute

8y+48 = 6y +60

subtract 6y from each side

2y +48 = 60

subtract 48 from each side

2y = 12

divide by 2

y = 6

sv =     (y+4+6)

sv   = 6+4+6

sv = 16

can you expand on the question i may be able to