Shrinking a triangle keeping all angles the same (for practical application)
We use similar triangle when the two triangles have same angle sizes then the ratio between similar sides are equal. So in our case we have a triangle with sides (212,210,30) and the other triangle you have you slope of 195 that the hypotenuse so we have (195,s,b) To figure out the remaining we need to have $$\frac{195}{212}=\frac{s}{210}$$ and the other side $$\frac{195}{212}=\frac{b}{30}$$