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Introduction of the Topic
Lesson: Describing and illustrating Different kinds of Angles
(Right, Acute, and Obtuse) Using Models
A
Ray AB meets with Ray AC at Point A. When two rays meet at a common
an angle. Point A, the common endpoint, is called the verter. An angle can be
s read as "angle BAC", CAB is read as "angle CAB" and A is read as "angle A.
An angle is measured in degrees lo). An angle can be class
neasurements. A protractor is a device used in measuring and illustratin
A right angle measures exactly 90 degrees. It forms a squa