Which of the following may not be true for a parallelogram to be a rhombus

a. the diagonals are perpendicular
b. the diagonals are congruent
c. all sides are congruent
d. each diagonal bisects each pair of opposite angles

17 1/3

step-by-step explanation:

answer is : muchas/tipicas

have a nice day!

~recklesschicken

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