Question

how to find actual distance for a random problem?

Answer 1

use the formula \[distance=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}\]

Answer 2

uhh sorry i forgot to mention it's in scale.. the method u gave me is in coordinates geometry

Answer 3

what problem, specifically?

Answer 4

a scale is given 1:20. Calculate the area of a room is in m-square, if it is represented on a map by an area of 12 cm-sqaure

Answer 5

ah
to find area in scale questions

simply square both sides, then adjust the values accordingly to get your ratio

Answer 6

umm how to write it?

Answer 7

because for example
1cm:10cm
=1cm^2:100cm^2

using your scale of 1:20, it would be?

Answer 8

does it become 1m^2:20m^2?

Answer 9

No.

scales without units are always in cm
therefore 1:20 would be 1cm:20cm

try again? (: do it step by step

Answer 10

ok so u are saying to make it become ^2??

Answer 11

It would become (1cm)^2:(20cm)^2

Answer 12

Which would become 1cm^2 : 400cm^2

Answer 13

u're sure doesn't bcome 1:400??

Answer 14

yea ya same thing then what do we do??

Answer 15

You would need to find the length of one side of the square and then multiply it by the scale

Answer 16

uhh what do u mean??

Answer 17

okay i'll write the whole sequence out for you, if you don't understand any part, just ask all right? ^^

1:20
=1cm : 20cm
=(1cm)^2 : (20cm)^2
=1cm^2 : 400cm^2

as on the map, its 12cmsquare

1cm^2 : 400cm^2
=12cm^2 : 4800cm^2

now, convert 4800cm^2 to m^2
***Note: 1m^2 is not 100cm^2

Answer 18

well if we get one side then we can multiply it by the scale to get what its actual dimension would be.

Answer 19

@TheSmartOne hmm i think this question is more of pure scaling and less of similar figures

Answer 20

4.8m^2

Answer 21

or you don't need to find one sides length

Answer 22

you can use the whole area and multiply it by the scale like what @Auxuris did. and then simplify it

Answer 23

@angel-ameerah
nope
how many cm^2 is 1m^2?

1m^2 = ____cm^2 ?

Answer 24

1000?

Answer 25

ah okay, take note

1m^2 is 100cmx100cm
therefore it's 10000cm^2

don't worry, its a mistake many make.

Answer 26

ohh thnks u understand me well.. so it becomes 0.48??

Answer 27

Yep, 0.48m^2 (:

Answer 28

thnku :)