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Topic:class:
Let’s start module
Angles7 TH
Programmed Instructional material
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ObjectivesAt the end of this module you will be able to-To know about definition of angles.To know about there types.To draw and identify different angles.
Let’s start module
Angles • A figure formed by two rays with a common
initial point is called an angle.• It is denoted by ‘>’. • In a figure, an angle is formed by rays BA & BC. BA and BC are the arms of the angles and the common
initial point B is called the vertex.
Lets answer some questionsanswer 3
Lets answer some questionsanswer 4
Types of angles• Definition • When two arms of an angle overlap each other , the angle formed between
is zero angle.• An angle which measures between 0◦ and 90◦ is called acute angle• An angle which measure 90◦ is called a right angle.• An angle which measure more than 90◦ but less than 180◦ is called a obtuse
angle.• An angle which measure 180◦ is called a straight angle.• An angle which measure more than 180◦ but less than 360◦ is called a reflex
angle.• When the sum of two angle are 90◦ is known as complementary angle.• When the sum of two angles are 180◦ is known as supplementary angle.• An angles which measure is 360◦ is known as complete angle.
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Q1: An angle is formed by joining______rays.
-2
-4
-3
-5
B
C
D
A
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Hint!
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Hint!
1
2 An angle.
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A) Congratulations you have selected Right Answer!
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Q 2:common initial point of an angle is known as ________
-Bisector .
-Vertex.
-Diagonal.
-Arms.
B
C
D
A
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Hint!
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Hint!
An angle.
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Q3: The zero angle is the angle in which both the arms __________
- Does not overlaps.
-Coincides.
-Never overlaps.
-overlaps.
B
C
D
A
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Hint!
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Hint!
0°angle
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D) Congratulations you have selected Right Answer!
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Q 4:The angles which measure between 0° to 90° is termed as_________ angle.
-Acute.
-Right.
-Obtuse.
-Reflex.
B
C
D
A
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Hint!
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Hint!
45°
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A) Congratulations you have selected Right Answer!
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Q5:Which angle is formed if its measures 90° ?
-Zero.
-Acute
-Obtuse.
- Right.
B
C
D
A
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Hint!
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Hint!
90°
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D) Congratulations you have selected Right Answer!
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Q6:The angle which measures between 90° to 180° is termed as _________ angle.
-Right.
-Acute.
-Obtuse.
-Straight.
B
C
D
A
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Hint!
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Hint!
115°
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C)Congratulations you have selected Right Answer!
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Q7: _______ angle measures 180°.
-Zero.
-Straight
-Obtuse.
-Acute.
B
C
D
A
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Hint!
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Hint!
180°
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B)Congratulations you have selected Right Answer!
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Q8:An angle which measure more than 180° but less than 360°is called _______ angle.
-Right.
-Acute.
-Complete.
- Reflex.
B
C
D
A
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Hint!
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Hint!
285°
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D) Congratulations you have selected Right Answer!
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Congratulations you have Scored 80 marks!
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