This is a free lesson from our course in Trigonometry
This lesson explains the basic concepts of angle and different ways of measuring
angles. Furthur you'll learn with the help of video and explanation by the instructor
in own hand writing to solve the problems that involve angular measures. Than you'll
explore the basic principles about the relationships between the area of a triangle and its interior angles. An angle is formed by two rays meeting
at a common endpoint. The point where the rays meet is called 'vertex' of the angle and the amount or degree of counter-clockwise rotation of a ray about the vertex is called the
angle measure.(More text below video...)
(Continued from above) The sides of the angle are the two rays while the vertex
is their common endpoint. You can put three letters which represent points.
For example: In angle AOB, point O is the vertex of the angle. The
first and third letters represent points on each of the rays that form one of the
sides. The middle letter represents the vertex.
Angles are measured in degrees. The number of degrees tell you how wide open the
angle is. You can measure angles with a protractor.
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