Types of Angles.

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Presentation transcript:

Types of Angles

Types of Angles Acute Angle: An angle whose measure is less than 90° but greater than 0° is called an Acute angle. Example: 15°,30°,60°,75°. Obtuse Angle: An angle whose measure is more than 90° is called Obtuse angle. Example: 100°,110°,120°,140°. Right Angle: An angle whose measure is 90° is called a Right angle.

Straight Angle: When the rays of an angle are opposite rays forming a straight line, the angle thus formed is a straight angle and its measure is 180°. Reflex Angle: An angle whose measure is more than 180° but less than 360° is called a reflex angle. Complete Angle: The angle formed by OP and OQ is one complete circle, that is 360°. Such an angle is called a complete angle.

Complementary Angle If the sum of the measures of two angle is 90°, then the two angles are called complementary angles. The complement of 30°is 60°and the complement of 60°is30° Supplementary Angle If the sum of the measures of two angle is 180°, then the two angles are called supplementary angles. The supplement of 120° is 60° and the complement of 60° is120°

Try these Identify the following angles based on their types 34° , 84° , 103° , 147° , 180° , 275° , 360° 2. Find the supplement angle of 112°? 3. Find the complement angle of 63°?