Similar Figues

Question 0

Side length of box ^ by 3
A) find surface area of new box if original area is 94cm^2
B) find volume of new box. Original = 60cm^3

Answer 0

94 * 3^2 (side length ^ by 3, area ^ by 3^2)
94*9= 848cm^2

60cm^3 * 3^3
60 ^3 * 27
Volume = 1620 cm^3

Question 1

Area of family room is 16m^2

Find the area of room on a plan that uses scale of 1:20

Answer 1

Every unit on plan represents 20 units in real life. 
20m = 1 m 
10 m = .5m 
4 = .2m 
4 * 4 = 16m ^2 
On plan: 0.2m * 0.2m
= 400cm^2

Question 2

Volume of a swimming pool on plan is 20cm^2

Find the volume of the pool if plan scale has scale of 1:75

Answer 2

Volume- dimensions = 3
Model: 111
Actual: 75^3
20cm * 75^ 3 = answer

Question 3

Total surface area of wings is 120m^2

Find total surface area of wings on scale model using scale 1:80

Answer 3

How many dimensions- 2 (squared #s)

120 / 80^2 = answer

Question 4

Congruency tests

Similarly test

Answer 4

SSS
ASA
SAS
RHS

AAA
SSS
SAS
RHS

Question 5

Complimentary angle

Answer 5

90

Question 6

Factors

Answer 6

s you can multiply to get another # 2 &3 factors of 6

Question 7

Multiple

Answer 7

# that is the product of a whole # & another whole number 
Eg: multiples of 5 : 5,10 ...

Question 8

Surd

Answer 8

Irrational # that’s represented by square root sign

Eg: square root of 7

Question 9

HCF OF 25mn & 15 lm

Answer 9

5m

Question 10

(2/3) ^-1

Answer 10

Write the reciprocal & change Index to + value

3/2 or 1 1/2

Question 11

340 000 in scientific notation to 3 significant numbers

Answer 11

4.40 * 10^5