PRESENTATION OUTLINE
Different types of angles:
a.)Straight angle
b.)Right angle
c.)Acute angles
d.)Obtuse angles
e.)Reflex angles
a.)Straight angle
-It is one-half of a whole turn, and is the same as the angle made by rays going in opposite directions. The measure of the angle is 180º.
b.)Right angle
-It is one-quarter of a whole turn and is the same as the angle made by a horizontal line and vertical line. The measure of the angle is 90º.
c.)Acute angles
-The angles that lie between 0º and 90º are called acute. Some examples are shown below
d.)Obtuse angles
-The angles that lie between 90º and 180º are called obtuse.
e.)Reflex angles
-The angles that lie between a straight angle (180º) and a whole turn (360º) are called reflex angles.
