The drop down menus consist of (Division Property Of Equality)(Pythagorean Theorem)(Substitution Property Of Equality)(ASA Criterion)(AA Criterion)(SAS Criterion)(SSS Criterion)

The first blank is :
Pythagorean theorem
The second blank is:
Substitution Propert of Equality
The third blank is
Division propert of Equality
The fourth blank is:
SSS criterion.