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Well Whaddya Know?Well Whaddya Know?
Angles
Well Whaddya Know?Well Whaddya Know?
An angle is measure
of rotation
Angles 1a
True or False?
Well Whaddya Know?Well Whaddya Know?
An angle is measured
in…A. millimetresB. degreesC. ampsD. JulesE. litres
Angles 1b
Types of Angles
Well Whaddya Know?Well Whaddya Know?
This angle is…A. an obtuse
angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle
Angles 1c
Types of Angles
Well Whaddya Know?Well Whaddya Know?
This angle is…A. an obtuse
angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle
Angles 1d
Types of Angles
Well Whaddya Know?Well Whaddya Know?
This angle is…A. an obtuse
angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle
Angles 1e
Types of Angles
Well Whaddya Know?Well Whaddya Know?
This angle is…A. an obtuse
angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle
Angles 1f
Types of Angles
Well Whaddya Know?Well Whaddya Know?
This angle is…A. an obtuse
angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle
Angles 1g
Types of Angles
Well Whaddya Know?Well Whaddya Know?
A. is greater than 90° less than 180°
B. is greater than 180° less than 360°
C. is less than 90°D. is exactly 180°E. is exactly 90°
Angles 1h
Types of Angles
an
obtuse
angle…
Well Whaddya Know?Well Whaddya Know?
A. is greater than 90° less than 180°
B. is greater than 180° less than 360°
C. is less than 90°D. is exactly 180°E. is exactly 90°
Angles 1i
Types of Angles
a
reflex
angle…
Well Whaddya Know?Well Whaddya Know?
A. is greater than 90° less than 180°
B. is greater than 180° less than 360°
C. is less than 90°D. is exactly 180°E. is exactly 90°
Angles 1j
Types of Angles
an
acute
angle…
Well Whaddya Know?Well Whaddya Know?
A. is greater than 90° less than 180°
B. is greater than 180° less than 360°
C. is less than 90°D. is exactly 180°E. is exactly 90°
Angles 1k
Types of Angles
a
straight
angle…
Well Whaddya Know?Well Whaddya Know?
A. is greater than 90° less than 180°
B. is greater than 180° less than 360°
C. is less than 90°D. is exactly 180°E. is exactly 90°
Angles 1l
Types of Angles
a
right
angle…
Well Whaddya Know?Well Whaddya Know?Angles 2a
Naming Angles
J
K L
J
K L
leg
leg
arm
arm
A B
vortex vertex
Which diagram uses the correct language for describing an angle? Choose A or B
Well Whaddya Know?Well Whaddya Know?Angles 2b
Naming Angles
X
Y Z
True or False?
We name an angle by using three capital letters
Well Whaddya Know?Well Whaddya Know?Angles 2c
Naming Angles
X
Y Z
True or False?
The angle shown can be named angle XYZ or angle ZYX
Well Whaddya Know?Well Whaddya Know?Angles 2d
Naming Angles
X
Y Z
True or False?
Two short ways of writing angle XYZ are XYZ
XYZ
and
Well Whaddya Know?Well Whaddya Know?Angles 2e
Naming Angles
G
M T
The name of this triangle could be…
A GTM
B TGM
C MGT
D MGT
E GMT
Well Whaddya Know?Well Whaddya Know?Angles 2f
Naming Angles
R
S T
The name of this triangle could be…
A RST
B TRS
C RTS
D STR
E SRT
Well Whaddya Know?Well Whaddya Know?Angles 2g
Naming Angles
P
Q R
The name of this triangle could be…
A PRQ
B QPR
C RQP
D QRP
E RPQ
Well Whaddya Know?Well Whaddya Know?Angles 2h
Naming Angles
A
C B
The angle marked could be named
A ADC
B BAD
C BCD
D ABC
E DAC
D
Well Whaddya Know?Well Whaddya Know?Angles 2i
Naming Angles
X
Y Z
True or False?
The letter at the vertex is always in the middle of the angle name.
Well Whaddya Know?Well Whaddya Know?Angles 3a
Measuring Angles
G
M T
To measure the size of an angle we use a…
A ruler
B set square
C protractor
D stopwatch
E volt meter
Well Whaddya Know?Well Whaddya Know?Angles 3b,c, d
Measuring Angles
A
B C
On your sheet you will find three angles to measure.
Write the size of the angle in the correct box
ABC = ° 3b XYZ = °
3c UVW = ° 3d
X
Y Z U
VW
Well Whaddya Know?Well Whaddya Know?Angles4a, b, c
Drawing Angles
On your sheet you will find space to draw three angles. Remember to name them properly.
ABC = 120° 4a
XYZ = 72° 4b UVW = 90° 4c
2marks 2marks2marks
Well Whaddya Know?Well Whaddya Know?Angles 5a
Complementary and Supplementary Angles and Angles in a Revolution
A 90°
B 180°
C 270°
D 360°
Complementary angles
add up to…
Well Whaddya Know?Well Whaddya Know?Angles 5b
Complementary and Supplementary Angles and Angles in a Revolution
A 90°
B 180°
C 270°
D 360°
Supplementary angles
add up to…
Well Whaddya Know?Well Whaddya Know?Angles 5c
Complementary and Supplementary Angles and Angles in a Revolution
A 90°
B 180°
C 270°
D 360°
Angles in a revolution
add up to…
Well Whaddya Know?Well Whaddya Know?Angles 5d
Complementary and Supplementary Angles and Angles in a Revolution
What is the size of the angle marked a
A 90°
B 120°
C 30°
D 60°30°
a
Well Whaddya Know?Well Whaddya Know?Angles 5e
Complementary and Supplementary Angles and Angles in a Revolution
What is the size of the angle marked a
A 90°
B 150°
C 230°
D 60°30°
a
Well Whaddya Know?Well Whaddya Know?Angles 5f
Complementary and Supplementary Angles and Angles in a Revolution
What is the size of the angle marked a
A 290°
B 275°
C 150°
D 180°30°180
a
Well Whaddya Know?Well Whaddya Know?Angles 6a
Vertically opposite angles
The two angles that are marked are the same size
A True
B False
Well Whaddya Know?Well Whaddya Know?Angles 6b
Vertically opposite angles
The two angles that are marked are the same size
A True
B False
Well Whaddya Know?Well Whaddya Know?Angles 6c
Vertically opposite angles
If angle c is 70° what size do you think angle d is?
A 45°
B 120°
C 70°
D 90°
c
d
Well Whaddya Know?Well Whaddya Know?Angles 6d
Vertically opposite angles
If angle c is 70° what size do you think angle d is?
A 50°
B 110°
C 120°
D 40°
cd
Well Whaddya Know?Well Whaddya Know?Angles 6e
F angles – usually known as corresponding angles
If angle c is 120° what size do you think angle d is?
A 50°
B 90°
C 190°
D 120°
c
d
Well Whaddya Know?Well Whaddya Know?Angles 6f
Z angles – usually known as alternate angles
If angle c is 45° what size do you think angle d is?
A 55°
B 95°
C 45°
D 125°
c
d
Well Whaddya Know?Well Whaddya Know?Angles 6g
F angles – usually known as corresponding angles
If angle c is 120° what size do you think angle e is?
A 50°
B 90°
C 190°
D 120°
c
de
Well Whaddya Know?Well Whaddya Know?Angles 7a
Angles in a shape
Angles in a square or a rectangle add up to…
A 90°
B 180°
C 270°
D 360°
W
Z Y
X
Well Whaddya Know?Well Whaddya Know?Angles 7b
Angles in a shape
Angles in a triangle add up to…
A 90°
B 180°
C 270°
D 360°
T S
R
Well Whaddya Know?Well Whaddya Know?Angles 7c
Angles in a shape
Angles in a quadrilateral add up to…
A 90°
B 180°
C 270°
D 360°
G
FE
H
Well Whaddya Know?Well Whaddya Know?Angles 7d
Angles in a shape
How many degrees in a circle?
A 90°
B 180°
C 270°
D 360°
Well Whaddya Know?Well Whaddya Know?Angles
Bitesize Angles from the BBC
http://www.bbc.co.uk/schools/gcsebitesize/maths/shapes/anglesact.shtml
Some angles stuff from those lovely people at the BBC… that’s angles…
not angels!
Some work for those smarty pants amongst you
And why not check out the Maths Revision Blog for anything you need extra practice on, or for some notes you might have missed in class