Explain how to estimate 245 ÷ 41 by using rounding and then find the estimate

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

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?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'