[R] object class for triangles

[Ember Kata]

My task is to create an object class for triangles. I have made a function:

triangle<- function(a,b,gamma) {
c <- sqrt (a^2+b^2-2*a*b*cos(gamma/180*pi))
beta <- (acos((a^2+c^2-b^2)/(2*a*c)))/pi*180
alfa <- 180-(beta+gamma)
T <- (a*b*sin(gamma/180*pi))/2
K <- a+b+c
cat ('side of triangle: ',a,b,c,'\n',
 'degree of triangle: ',alfa,beta,gamma,'\n',
'perimeter: ',K,'area:', T)}

But this is only a simple function without object or class. Can you help me,
how I can make an object class for triangles from this?

Thanks,
Ember Kata
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