Which unidentifed term is used to define an angle?

An undefined term is used to define an angle is a "line". So, we can define an angle as the corners that are formed when two non-parallel lines get intersected. And the space between them is known as "angle"

answer: slight chance that it will happen

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11