Area of rhombus = 
where x and y are diagonals.
Given length of one diagonal is 4.5 dm
So, let x= 4.5dm
1 dm = 10 cm
4.5dm= 45cm
area = 
so, 
y = 24 cm
The two diagonals are x= 45cm and y = 24cm
Since diagonals bisect each other, we get 22.5cm and 12cm
Using right triangle formula



r = 10.588cm
Distance of center to the side =
= 5.294 cm
UM i need more details sorry but i dont know it
Ur welcome
A friend trying to help
Its right and isosceles because the little squares means that's it's a right triangle. And the lines means it's identical which an isosceles has two identical lines