317;318;320

/ anikaramyan1

a) S = ½•12√2•4•√3/2 = 6√2•4•√3/2
6√2•2√3 = 12√6
b) S = ½•3•18√2•√2/2 = 3•9√2•2√2 = 54/2 = 27
g) S = ½•14•7•77/100
7•7•77/100 = 3773/100 = 37,73

60 = ½•15•x•1/2
60 = 1/4•15•x
60 = 15/4x
16 = x
x=16

S = ½•2•2•1/2 = 1



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