The center of the incircle can be found as the intersection of the three internal angle bisectors.
From the en.wikipedia.org
Said correction will improve the internal angle of the nasal valve and thus allow unobstructed breathing.
From the en.wikipedia.org
This represents our angle of internal friction.
From the newscientist.com
They typically measure some angle of refraction or the critical angle for total internal reflection.
From the en.wikipedia.org
The center of an excircle is the intersection of the internal bisector of one angle and the external bisectors of the other two.
From the en.wikipedia.org
If light inside the prism hits one of the surfaces at a sufficiently steep angle, total internal reflection occurs and all of the light is reflected.
From the en.wikipedia.org
The executive who led BP's internal investigation said the company did not focus on that angle.
From the au.news.yahoo.com
Brewster's angle, the critical angle for total internal reflection, and the reflectivity of a surface is also affected by the refractive index.
From the en.wikipedia.org
Because the internal bisector of an angle is perpendicular to its external bisector, it follows that the center of the incircle together with the three excircle centers form an orthocentric system.