Angle - Angles are formed by two rays or two line segment that begin at the same
point.  
                             
Angle
Two rays that share the same endpoint form an
angle. The point where the rays intersect is called
the
vertex of the angle. The two rays are called the
sides of the angle.
vertex
These two rays
form an angle
end point
Types of angles
Obtuse angle-Measures
between 90  and 180 degrees
Acute angle-Measures
between 0 and 90  and  degrees
straight angle-Measures
between 0 and 90  
degrees
reflex angle-Measures
greater than 180º and less than 360º.
Right angle
vertex
vertex
vertex
vertex
vertex
Math Glossary
Math A Tube
Homepage