Everyday Math Grade 4 – Lesson 1.3 Part 1: Angles Copyright © 2010 Kelly Mott.

Everyday MathGrade 4 – Lesson 1.3

Part 1: Angles

Copyright © 2010 Kelly Mott


Math Boxes Lesson 1.3


Math Box 1:


Math Box 2:


Math Box 3:


Math Box 4:


Math Box 5:


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


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%



A __________ straight path that has a starting point and goes forever in one

direction.

Line

Line se

gment Point

Ray

0% 0%0%0%



A __________ is made up of 2 points with a straight path between them.

Line

Line se

gment Point

Ray

0% 0%0%0%



__________or _________ _____________________


Name the Line, Line Segment, or Ray

Q R W X

__________or _________

__________or _________

__________or _________ __________or _________


Name the Line, Line Segment, or Ray

E F G L M


Lesson 1.3 Part 1Skill: Angles

Part 1: What are angles?


What are angles?


• 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.


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.


Draw an Angle

Part 2: How do you name an angle?


• 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.)


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


Names:1. ___________________2. ___________________3. ___________________

N M

O

Name the Angles 2

ED

FNames:1. ___________________2. ___________________3. ___________________

PQ

R


Names:1. ___________________2. ___________________3. ___________________

TS U

Name the Angles 3

ED

FNames:1. ___________________2. ___________________3. ___________________

V

W X


Names:1. ___________________2. ___________________3. ___________________

BA

C

Name the Angles 4

ED

FNames:1. ___________________2. ___________________3. ___________________

DE

F


Part 3: Types of Angles


What types of angles are there?


• A protractor is used to measure angles.• Angles can be classified into types according

to what they measure.


Types of Angles

• A _______________ angle measures 90 degrees.


Types of Angles

• f

Circle the Right Angles


• An _______________ angle measures less than 90 degrees.


Types of Angles

• f

Circle the Acute Angles


• An _______________ angle measures more than 90 and less than 180.


Types of Angles

• f


Circle the Obtuse Angles

• A _______________ angle 180 degrees.


Types of Angles

• f


Circle the Straight Angles

Part 4: Angle Type Review


A

BC

Name the Angle


Right Angle

90 degrees


Name the AngleAcute Angle

Less than 90 degrees


Name the AngleObtuse Angle

Greater than 90 degrees and less than 180 degrees


Name the AngleStraight Angle

180 degrees

Part 5: Angle Challenge


• Write how many and name the angles:

How many right angles?

_____________________ How many acute angles?

_____________________ How many obtuse

angles?

_____________________

A

B C

Angle Challenge




_____________________ How many acute

angles?

_____________________ How many obtuse

angles?

_____________________

A

B C

D


Angle Challenge



_____________________ How many acute angles?

_____________________ How many obtuse

angles?

_____________________

A

B C

D


Angle Challenge

Part 6: BRAIN POP - ANGLES


BRAIN POPVideo:http://www.brainpop.com/math/geometryandmeasurement/angles

/Quiz:http://www.brainpop.com/math/geometryandmeasurement/angles/quiz/

Copyright © 20010Kelly Mott

http://www.brainpop.com/math/geometryandmeasurement/angles/



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HOMEWORK

Everyday Math Grade 4 – Lesson 1.3 Part 1: Angles Copyright © 2010 Kelly Mott.

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