List the congruent parts of the triangles.

please help

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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.