Calculate the perimeter and area of ​​a rhombus whose diagonals are 39 cm and 51 cm long.

Correct answer:

p =  128.4056 cm
S =  994.5 cm2

Step-by-step explanation:

u1=39 cm u2=51 cm  a2=(u1/2)2+(u2/2)2 a=(u1/2)2+(u2/2)2=(39/2)2+(51/2)232.1014 cm  p=4 a=4 32.1014=6 458=128.4056 cm
S=2u1 u2=239 51=21989 cm2=994.5 cm2

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