Year 9 Revision

Exchange rates

100

What is the exchange rate?

The amount of another currency that equals 1AUD

e.g. 0.76 USD = 1 AUD 0.76 is exchange rate

200

if 1 AUD = 20 Yen, how much is 50AUD in Yen?

1000 Yen

300

if 1 AUD = 100 Yen how much is 3000 Yen in AUD?

HINT (DIVIDE by exchange rate)

30 AUD

400

if 250 Yen = 5 AUD, how much is 17 AUD in Yen?

(HINT: find how much 1 AUD equals first)

850 Yen

Pythagoras

100

what is pythagoras' theorem?

a² + b² = c²

200

what is the longest side of a right-angled triangle

(Double points if you remember what the other sides are called) 

Hypotenuse 

Double points

Opposite and Adjacent

300

find the distance between the two coordinates 

(11,3) and (6,1)

Distance =5.38 

5² +2² = 25 + 4 = 29

Square root 29 = 5.38

400

Find the distance between the two points

(6, 3) and (-2, -4)

Distance = 10.95

8² + 7² = 64 + 56 = 120

Square root 120 = 10.95 

Mr Goncalves Trivia

100

What was my favourite subject in school other than HPE?  (Hint it wasn't math)

Chemistry

200

What is my favourite Dessert?

Tiramisu

300

What sport do I play?

Tennis 

Basketball

Netball

Weight lifting

400

what is my dream car?

1969 Mustang

Scale factor

100

What is the formula for scale factor?

Scale factor = image / original 

or

original x scale factor = image

200

What would be the new length of a rectangle that is 3cm, if it has been upscaled by a scale factor of 5x

15cm

300

if a triangle has a base of 25cm, and it has been downscaled by a scale factor of 5, what would the new triangle's base be?

5cm

400

if the area of a rectangle is 20cm² and the scale factor is 2, what would be the area of an enlarged rectangle 

(Hint: scale area = scale factor²)

80cm²