What is a figure with no endpoints called

Drag each sequence of transformations to the correct location on the table. classify the sequences of transformations based on whether or not they prove the congruency of the shapes by mapping shape i onto shape ii. plz i'll rate u 5 stars need this done for a mastery test

The longer leg of a 30-60-90 trangle is 18

Y+ 2/y is it a polynomial in one variable or not? and if so, why?