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1 Cambridge V Math Angles

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Subject: Mathematics

Topic: Angles

Grade: V

Cambridge/V/2122 Angles 1of 13


Angles

What do you mean by an


‘angle’?

 An angle is a measure of a turn.

Arm of an angle
 When two lines meet each other
at a point, an angle is formed.

 The two lines forming an angle are


called ‘arms of the angle’. 90

Arm of an angle
 It is measured in degrees.

Cambridge/V/2122 Angles 2 of 13
What type of angles are these?

Acute Angles

Cambridge/V/2122 Angles 3 of 13
Acute Angles
• An acute angle is an angle measuring between 0 and 90 degrees.
• The following angles are all acute angles.

Cambridge/V/2122 Angles 4 of 13
What type of angles are these?

Obtuse Angles

Cambridge/V/2122 Angles 5 of 13
Obtuse Angles
• An obtuse angle is an angle measuring between 90 and 180
degrees.
• The following angles are all obtuse.

Cambridge/V/2122 Angles 6 of 13
What type of angles are these?

Right Angles

Cambridge/V/2122 Angles 7 of 13
Right Angles
• A right angle is an angle measuring 90 degrees.
• The following angles are right angles.

Cambridge/V/2122 Angles 8 of 13
What type of angles are these?

Straight Angles

Cambridge/V/2122 Angles 9 of 13
Straight Angle
• A straight angle measures 180 degrees.

Cambridge/V/2122 Angles 10 of 13
Classify the given angles into acute and obtuse angles on the
basis of their measures.

Cambridge/V/2122 Angles 11 of 13
What is the measure of a complete angle?

360 degrees

Which three of these pieces fit together to make a complete


circle?

Cambridge/V/2122 Angles 12 of 13
Thank you

Cambridge/V/2122 Angles 13 of 13

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