Which rigid motion verifies the triangles are congruent by SAS

Alarge rectangle is divided into four smaller rectangles.

For what values of b will f(x)= logbx be a decreasing function? (16 )

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?