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삼각형 면적 = width*height/2 = */2 = 0

직사각형 면적 = width*height = * = 0

원 면적 = pi*radius^2 = 3.1415926535898*^2 = 0

직육면체 체적 = width*height*length = ** = 0

원통 체적 = pi*radius^2*height = 3.1415926535898*^2* = 0

구 체적 = 4/3*pi*radius^3 = 4/3*3.1415926535898*^3 = 0