well whaddya know 2

Well Whaddya Know?Well Whaddya Know?

Angles


An angle is measure

of rotation

Angles 1a

True or False?


An angle is measured

in…A. millimetresB. degreesC. ampsD. JulesE. litres

Angles 1b

Types of Angles


This angle is…A. an obtuse

angleB. a reflex AngleC. an acute angleD. a straight angleE. a right angle

Angles 1c

Types of Angles




Angles 1d

Types of Angles




Angles 1e

Types of Angles




Angles 1f

Types of Angles




Angles 1g

Types of Angles


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…





Angles 1i

Types of Angles

a

reflex

angle…





Angles 1j

Types of Angles

an

acute

angle…





Angles 1k

Types of Angles

a

straight

angle…





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


A RST

B TRS

C RTS

D STR

E SRT

Well Whaddya Know?Well Whaddya Know?Angles 2g

Naming Angles

P

Q R


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.


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


Complementary and Supplementary Angles and Angles in a Revolution

A 90°

B 180°

C 270°

D 360°

Complementary angles

add up to…



A 90°

B 180°

C 270°

D 360°

Supplementary angles

add up to…



A 90°

B 180°

C 270°

D 360°

Angles in a revolution

add up to…



What is the size of the angle marked a

A 90°

B 120°

C 30°

D 60°30°

a




A 90°

B 150°

C 230°

D 60°30°

a




A 290°

B 275°

C 150°

D 180°30°180

a


Vertically opposite angles

The two angles that are marked are the same size

A True

B False



The two angles that are marked are the same size

A True

B False



If angle c is 70° what size do you think angle d is?

A 45°

B 120°

C 70°

D 90°

c

d




A 50°

B 110°

C 120°

D 40°

cd


F angles – usually known as corresponding angles


A 50°

B 90°

C 190°

D 120°

c

d


Z angles – usually known as alternate angles


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


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


Angles in a shape

Angles in a triangle add up to…

A 90°

B 180°

C 270°

D 360°

T S

R


Angles in a shape

Angles in a quadrilateral add up to…

A 90°

B 180°

C 270°

D 360°

G

FE

H


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

well whaddya know 2

Education

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