Write the word name for each number and tell the value of the underlined digit 843,208,732,833 and the number under lined is the first 8

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

What additional information could be used to prove abc =mqr using sas? check all that apply.