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Everyday MathGrade 4 – Lesson 1.3
Part 1: Angles
Copyright © 2010 Kelly Mott
Copyright © 2010 Kelly Mott
Math Boxes Lesson 1.3
Copyright © 2010 Kelly Mott
Math Box 1:
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Math Box 2:
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Math Box 3:
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Math Box 4:
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Math Box 5:
Copyright © 2010 Kelly Mott
REVIEW
A __________ is a location in space that is usually marked with a dot.
Line
Line se
gment Point
Ray
0% 0%0%0%
Z
1. Line2. Line segment3. Point4. Ray
Copyright © 2010 Kelly Mott
A __________ is made up of a set of points and continues without end in
both directions.
Line
Line se
gment Point
Ray
0% 0%0%0%
1. Line2. Line segment3. Point4. Ray
Copyright © 2010 Kelly Mott
A __________ straight path that has a starting point and goes forever in one
direction.
Line
Line se
gment Point
Ray
0% 0%0%0%
1. Line2. Line segment3. Point4. Ray
Copyright © 2010 Kelly Mott
A __________ is made up of 2 points with a straight path between them.
Line
Line se
gment Point
Ray
0% 0%0%0%
1. Line2. Line segment3. Point4. Ray
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__________or _________ _____________________
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Name the Line, Line Segment, or Ray
Q R W X
__________or _________
__________or _________
__________or _________ __________or _________
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Name the Line, Line Segment, or Ray
E F G L M
Copyright © 2010 Kelly Mott
Copyright © 2010 Kelly Mott
Lesson 1.3 Part 1Skill: Angles
Part 1: What are angles?
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What are angles?
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• An angle is made up of ___ rays or ___ line segments that share an endpoint.
• The point that is shared is called the vertex. Label the vertex above.
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What is an angle?
• Draw an angle made up of two rays and label the vertex.
• Draw an angle made up of two line segments and label the vertex.
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Draw an Angle
Part 2: How do you name an angle?
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• An angle can be named 2 ways.• It can be named by its vertex.
• It can be named by its 3 points. (The vertex must be in the middle.)
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How do you name an angle?
A
B
C
D
E F
Names:1. ___________________2. ___________________3. ___________________
H
G
I
Name the Angles 1
ED
FNames:1. ___________________2. ___________________3. ___________________
JK
L
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Names:1. ___________________2. ___________________3. ___________________
N M
O
Name the Angles 2
ED
FNames:1. ___________________2. ___________________3. ___________________
PQ
R
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Names:1. ___________________2. ___________________3. ___________________
TS U
Name the Angles 3
ED
FNames:1. ___________________2. ___________________3. ___________________
V
W X
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Names:1. ___________________2. ___________________3. ___________________
BA
C
Name the Angles 4
ED
FNames:1. ___________________2. ___________________3. ___________________
DE
F
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Part 3: Types of Angles
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What types of angles are there?
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• A protractor is used to measure angles.• Angles can be classified into types according
to what they measure.
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Types of Angles
• A _______________ angle measures 90 degrees.
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Types of Angles
• f
Circle the Right Angles
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• An _______________ angle measures less than 90 degrees.
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Types of Angles
• f
Circle the Acute Angles
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• An _______________ angle measures more than 90 and less than 180.
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Types of Angles
• f
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Circle the Obtuse Angles
• A _______________ angle 180 degrees.
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Types of Angles
• f
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Circle the Straight Angles
Part 4: Angle Type Review
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A
BC
Name the Angle
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Right Angle
90 degrees
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Name the AngleAcute Angle
Less than 90 degrees
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Name the AngleObtuse Angle
Greater than 90 degrees and less than 180 degrees
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Name the AngleStraight Angle
180 degrees
Part 5: Angle Challenge
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• Write how many and name the angles:
How many right angles?
_____________________ How many acute angles?
_____________________ How many obtuse
angles?
_____________________
A
B C
Angle Challenge
Copyright © 2010 Kelly Mott
• Write how many and name the angles:
How many right angles?
_____________________ How many acute
angles?
_____________________ How many obtuse
angles?
_____________________
A
B C
D
Copyright © 2010 Kelly Mott
Angle Challenge
• Write how many and name the angles:
How many right angles?
_____________________ How many acute angles?
_____________________ How many obtuse
angles?
_____________________
A
B C
D
Copyright © 2010 Kelly Mott
Angle Challenge
• Write how many and name the angles:
How many right angles?
_____________________ How many acute angles?
_____________________ How many obtuse
angles?
_____________________
A
B C
D
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Angle Challenge
Part 6: BRAIN POP - ANGLES
Copyright © 2010 Kelly Mott
BRAIN POPVideo:http://www.brainpop.com/math/geometryandmeasurement/angles
/Quiz:http://www.brainpop.com/math/geometryandmeasurement/angles/quiz/
Copyright © 20010Kelly Mott
Copyright © 2010 Kelly Mott
Does this make sense?
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HOMEWORKEveryday Math Journal Page: 6
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Copyright © 2010 Kelly Mott
HOMEWORK
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HOMEWORK
Copyright © 2010 Kelly Mott
HOMEWORK
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HOMEWORK
Copyright © 2010 Kelly Mott
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