y=5/6+3
I am not positive on this answer I am sorry if it is wrong
Answer:
<h2><u><em>
X = 90°</em></u></h2>
Step-by-step explanation:
that is a regular rhombus, by definition it has perpendicular diagonals, so in the center there are 4 90 ° angles, so your answer is<u><em> x = 90 °</em></u>
It is given in the question that

And 
can also be written as

Therefore,


That gives,

What would you like to know? The total surface area? The lateral surface area? The volume, perhaps? The radius?