isa panta (Emp. fr. 17, 27) = all these are equal
ison amphoteron (Parm. fr. 9) = and both of them are equal
You can have a look at both Empedocles' and Parmenides' fragments in Kirk-Raven-Schofield, The Presocratic Philosophers, paragraphs 349 and 303 respectively
As for ison isakis, LSJ gives the following
of a number, equal multiplied by equal, i.e. square, Pl.R.546c, Tht. 147e, 148a, Euc.7 Def.19, Ph.1.11, etc.
hope it helps.