Gwen was cutting out some fabric for a friend she cut a piece yhat was 5 centimeters wide and 4 centimeters long what is the perimeter of the fabric she cut out?

I'll give brainliest if you answer right : )

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.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?