I’m not sure what this question is asking, but I’ll write an equation of this circle you are describing. Here, the x coordinate of the center is h, the y coordinate is k, and radius is r in the equation : (x-h)^2+(y-k)^2=r^2, meaning the equation in this situation is the following: (x-2)^2+(y-8)^2=9
If a quadrilateral is a rhombus then:
i) all its sides have equal length,
and
ii) the 2 diagonals are perpendicular and bisect each other.
The 2 diagonals of rhombus JKLM intersect at N.
Then m(MNJ)=90°, |JN|=4 and |NM|=3 units
thus, by the Pythagorean theorem,

The perimeter of the rhombus is 4*5 units=20 units.
Answer: 20 units
Theoretical probability is what u expect to happen...although it might not happen that way. The theoretical probability of spinning a coin 100 times and it landing on heads is 50%...and 50% of 100 = 50....so would expect it to and on heads 50 times.
The experimental probability is what actually happens...the experimental probability when spinning a coin 100 times and it landing on heads 38 of those times = 38/100 = 0.38 = 38%
0.6(10n + 25) = 10 + 5n
6n + 15 = 10 +5n
n = -5