The diagonals

The diagonals of the KOSA diamond are 20 cm and 48 cm long. Calculate the circumference of the diamond in centimeters rounded to one unit.

Correct result:

o =  104 cm

Solution:

u=20 cm v=48 cm  a2=(u/2)2+(v/2)2  a=(u/2)2+(v/2)2=(20/2)2+(48/2)2=26 cm  o=4⋅ a=4⋅ 26=104 cm

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