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• What does this figure called?
• What is the unit used for the
measurement of an angle?
• What is the vertex of an angle?
• What are the arms of an angle?
Look at the Figure
Which instrument is used to
measure an angle?
Compare these two angles?
Which angle is greater?
Types of Angles
• An angle of 90 degrees is called right
angle.
• The arms of a right angle are
perpendicular to each other.
Right Angle
Mrs. Right Angle
This is me. I’m
Mrs. Right Angle.
I always measure
90°, my favourite
shape is a square,
and whatsmore,
no matter what
my husband tells
you, I’m always
right!
• An angle less than 90 degrees and
greater than 0 degree.
Acute Angle
Baby Acute Angle
This is baby
Acute angle.
Isn’t he cute?! He
loves a hug, and
always has his
arms out for
cuddles! He’s the
smallest of the
family,
measuring less
than 90°.
• An angle of 180 degrees is called
straight angle.
• A straight angle forms a straight line.
• The arms of a straight angle extend in
opposite directions.
Straight Angle
An angle greater than 90 degrees and
less than 180 degrees is called obtuse
angle.
Obtuse Angle
Mr. Obtuse Angle
This is Obtuse. He’s
the husband of the
family. He’s bigger
than Right and
Acute . He’s always
inside, and he
always measures
between 90° and
180° (depending on
how much dinner
he’s eaten!)
RECAPITULATION
ANY QUESTION
CONSOLIDATION
Classify the angles whose sizes are
given below
1●
89●
180●
120●
90●
Acute Angle
Acute Angle
Straight Angle
Obtuse Angle
Right Angle
Calculate how many degrees
there are in
• 2 right angles
• 2 / 3 right angles
• 1 / 2 right angle
• 4 / 3 right angles
Classify the angles between
the hands of a clock.
Classify the angles between
the hands of a clock.
• Solve Question No 7 and 8 on
your notebooks. Submission Date
12-02-2020
HOME WORK
Conclusion
Today we have learnt about
4 types of angles,
Tomorrow we will learn about
Reflex angle and Complete
angle.
Angles final

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Angles final

  • 1.
  • 2. • What does this figure called? • What is the unit used for the measurement of an angle? • What is the vertex of an angle? • What are the arms of an angle? Look at the Figure
  • 3. Which instrument is used to measure an angle?
  • 4. Compare these two angles? Which angle is greater?
  • 6.
  • 7. • An angle of 90 degrees is called right angle. • The arms of a right angle are perpendicular to each other. Right Angle
  • 8. Mrs. Right Angle This is me. I’m Mrs. Right Angle. I always measure 90°, my favourite shape is a square, and whatsmore, no matter what my husband tells you, I’m always right!
  • 9.
  • 10.
  • 11. • An angle less than 90 degrees and greater than 0 degree. Acute Angle
  • 12. Baby Acute Angle This is baby Acute angle. Isn’t he cute?! He loves a hug, and always has his arms out for cuddles! He’s the smallest of the family, measuring less than 90°.
  • 13.
  • 14.
  • 15. • An angle of 180 degrees is called straight angle. • A straight angle forms a straight line. • The arms of a straight angle extend in opposite directions. Straight Angle
  • 16.
  • 17.
  • 18. An angle greater than 90 degrees and less than 180 degrees is called obtuse angle. Obtuse Angle
  • 19. Mr. Obtuse Angle This is Obtuse. He’s the husband of the family. He’s bigger than Right and Acute . He’s always inside, and he always measures between 90° and 180° (depending on how much dinner he’s eaten!)
  • 20.
  • 23. CONSOLIDATION Classify the angles whose sizes are given below 1● 89● 180● 120● 90● Acute Angle Acute Angle Straight Angle Obtuse Angle Right Angle
  • 24. Calculate how many degrees there are in • 2 right angles • 2 / 3 right angles • 1 / 2 right angle • 4 / 3 right angles
  • 25. Classify the angles between the hands of a clock.
  • 26. Classify the angles between the hands of a clock.
  • 27. • Solve Question No 7 and 8 on your notebooks. Submission Date 12-02-2020 HOME WORK
  • 28. Conclusion Today we have learnt about 4 types of angles, Tomorrow we will learn about Reflex angle and Complete angle.