Question

please answer the question​

Answer 1

Answer:

(a) BC is 9.

(b)b is 8 ...................

Answer 2

Answer:

being a rhombus all four sides of the parallelogram must be equal,

so ,

4a+5=15a-6

11a=11

a=1

thus,BC=9

we know that diagonals of a rhombus bisect at 90 degree

so,

11b+2=90

11b=88

b=8