Question 298475:  The diagonals of a rhombus are 6 cm and 8 cm. What is the perimeter of the rhombus? 
 Answer by nyc_function(2741)      (Show Source): 
You can  put this solution on YOUR website! Diagonal 6cm = 3cm + 3cm = legs of right triangle within rhombus.
 
Diagonal 8cm = 4cm + 4cm = legs of right triangle within rhombus.
 
We need to find the side of the rhombus using the Pythagorean Theorem.
 
After that, we use the formula P = 4s to find your perimeter.
 
Let s = side of rhombus.
 
3^2 + 4^2 = s^2
 
9 + 16 = s^2
 
25 = s^2
 
5 = s
 
Now that we know the side of the rhombus, apply P = 4s.
 
P = 4(5)
 
P = 20cm
 
 
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