Rhombus has side 17 cm and and one of diagonal 22 cm long. Calculate its area.

Correct result:

S =  285.2 cm2


S=2S1 ΔABC:a=17 a=17 u=22 s=(a+a+u)/2=(17+17+22)/2=28 cm S1=s(sa)(sa)(su) S1=28(2817)(2817)(2822)=142.58 cm2 S=2S1=2142.58=285.2 cm2

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