50 points and brainlest

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?