1.tri- just like 3 2-Angle- just an angle thats classification for yas all lol
The second angle? angle B?
An acute angle.
With a ray
An acute angle is smaller than a right angle.An obtuse angle is larger than a right angle.^_^
"right angle" is two lines that intersect at 90 degrees "acute angle" is when 2 lines meet at less than 90 degrees "obtuse angle" is when lines meet at an angle more than 90 degrees , a straight angle is when 2 lines meet at exactly 180 degrees.
No, but a quadrilateral can.
That's the "vertex" of the angle.