How do you you find the missing endpoint

In a 45-45-90 right triangle, what is the ratio of the length of one leg to the length of the other leg? а . 1: 2 в. 2: 1 с. 2: 1 d. 1: 1

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Plzzz answer both questions and i will give you 100 points