TYPES OF ANGLES

MATHEMATICS

1. presented by , J . M e r l i n R a j a B e r y l , Department o f M a t h e m a t i c s . T y p e s o f A n g l e s

2. Angle If t w o r a y s h a v e a n c o m m o n e n d p o i n t t h e y f o r m a n a n g l e . T h e t w o r a y s f o r m i n g a n a n g l e a r e c a l l e d t h e a r m s o f t h e a n g l e . T h e c o m m o n e n d p o i n t i s c a l l e d a v e r t e x o f t h e a n g l e .

3. T y p e s o f a n g l e s D e p e n d i n g o n t h e p o s i t i o n o f t h e a r m s , t h e r e a r e d i f f e r e n t t y p e s o f a n g l e s . Let's l e a r n a b o u t t h e m . . .

4. Types of Angles T h e r e a r e 6 Types of angles : Acute angle. Right angle. Obtuse angle. Straight angle. Reflex angle. Complete a n g l e .

5. A cute angle An a n g l e w h o s e m e a s u r e i s more than 0 ° but l e s s 9 ° is c a l l e d an a c u t e a n g l e . E x a m p l e : 3 ° , 4 5 ° , e t c

6. Acute angle Example : ° < 5 5 ° < 9 °

7. Examples for acute angle Examples for acute angle

8. Right angle A n a n g l e w h o s e measure i s 9 ° i s c a l l e d a r i g h t a n g l e . Example : 9 °

9. Other examples for right angle

10. Obtuse angle An angle whose measure is g reater than 90 ° and less than 180 ° i s c a l l e d a n o b t u s e a n g l e . E x a m p l e : 1 ° , 1 6 ° , e t c

11. Other examples for obtuse angle :

12. Straight angle A n a n g l e w h o s e m e a s u r e i s 1 8 ° i s c a l l e d a straight a n g l e . E x a m p l e : 1 8 °

13. Straight angle Exampl e : : : : :

14. Reflex angle An angle whose measure is g reater than 180 ° and less than 36 ° i s c a l l e d reflex a n g l e . E x a m p l e : 2 3 ° , 3 2 °

15. Reflex angle Example s :

16. Complete a n g l e W h e n t h e a r m s t a k e t h e c o m p l e t e t u r n t h e n t h e a n g l e o f m e a s u r e 3 6 ° i s f o r m e d . T h i s t y p e o f a n g l e i s c a l l e d a c o m p l e t e a n g l e .

17. Complete rotation Example :

18. R e m e m b e r :