Angles
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- Words: 273
- Pages: 13
ANGLES
RAY B
A
A straight path that starts from a point and goes towards horizon is a ray . Here ray is : AB
LINE A
B
A line is also a strait path that can be increased on both sides to horizon. Here line is XY
Difference between line and a ray A ray can b extended on one side only but a line can b extended on both sides.
ANGLES
Angle: An angle is formed bye two rays that start from one point. Here ABC is an angle. We right name of angle like ABC where vertex is written in centre.
A sides
vertex b B
C
ANGLES When a ray does not move then angle = 0°
ANGLES Angles are measured in degree when we start moving a ray which again ends at same point contains 360°
Straight angle When a ray complete semi circle it is called straight angle .Its measure is 180°
Right Angle When a ray moves one fourth of a circle it is called right angle . Its degree measure is 90°. XYZ is right angle. x
y
z
Acute angle The angle which is more than 0° and less than 90°. ABC is acute angle. d
a
b
c
Obtuse angle Angle greater than 90° and less than 180 ° is called obtuse angle. LMN is obtuse angle. t
l
m
n
Reflex angle Angle greater than 180° and less than 360° is reflex Angle.XOY is reflex angle t o y
x
Presented By:- Mrs. Barinder Chawla (Math Mistress) Govt. Girls Sr. Sec. School , SAHNEWAL
GUIDED BY:- LALIT MOHAN COMPUTER FACULTY
RAY B
A
A straight path that starts from a point and goes towards horizon is a ray . Here ray is : AB
LINE A
B
A line is also a strait path that can be increased on both sides to horizon. Here line is XY
Difference between line and a ray A ray can b extended on one side only but a line can b extended on both sides.
ANGLES
Angle: An angle is formed bye two rays that start from one point. Here ABC is an angle. We right name of angle like ABC where vertex is written in centre.
A sides
vertex b B
C
ANGLES When a ray does not move then angle = 0°
ANGLES Angles are measured in degree when we start moving a ray which again ends at same point contains 360°
Straight angle When a ray complete semi circle it is called straight angle .Its measure is 180°
Right Angle When a ray moves one fourth of a circle it is called right angle . Its degree measure is 90°. XYZ is right angle. x
y
z
Acute angle The angle which is more than 0° and less than 90°. ABC is acute angle. d
a
b
c
Obtuse angle Angle greater than 90° and less than 180 ° is called obtuse angle. LMN is obtuse angle. t
l
m
n
Reflex angle Angle greater than 180° and less than 360° is reflex Angle.XOY is reflex angle t o y
x
Presented By:- Mrs. Barinder Chawla (Math Mistress) Govt. Girls Sr. Sec. School , SAHNEWAL
GUIDED BY:- LALIT MOHAN COMPUTER FACULTY
