Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A wide range of empirical factors influences the perception of angles. In this scene, the subtenses of the three angular objects are identical, each measuring 92.5° on the printed page. As a result of this variety of depicted cues about the attributes of the possible real-world sources (see text), the subtenses of the three identical angles look quite different.
