s_area = lambda a: a*a
r_area = lambda l,b : l*b
t_area = lambda b,h : 0.5*b*h

print("Area of square of side (20) is:", s_area(20))
print("Area of Rectangle of length,bredth (30,20) is:", r_area(30,20))
print("Area of triangle of bredth,height (30,20) is:", t_area(30,20))