Answer:
19
Step-by-step explanation:
40-21+19
Answer: i would say probably 3 or -3
I hope it helps
Answer:

Step-by-step explanation:
we know that
The sides of a rhombus are all congruent and the diagonals are perpendicular bisectors of each other
so
Applying the Pythagorean Theorem

where
c is the length side of the rhombus
a and b are the semi-diagonals
we have

substitute the values



To find out the perimeter of the rhombus multiply the length side by 4

