Question

I need help with this question. It is similarity

Answer 1

question 3

Answer 2

the answer for 3a. is 15:16, 225:256

Answer 3

and for 3b. 1:20, 1:400

Answer 4

\[\frac{ 7 }{ 0.875 } = \frac{ x }{ 0.7 }\]

Answer 5

where did u get 0.7

Answer 6

oh wait i did your question 4

Answer 7

lel

Answer 8

oh its only questions 3

Answer 9

This is wat i did, but it is not the same as the answer

Answer 10

because \[(\frac{ 0.875 }{ 7 } ) ^3 = \frac{ 1 }{ 512 }\]

Answer 11

where did u get 512

Answer 12

calculator

Answer 13

0.875 divide by 7 then cube

Answer 14

ohhh

Answer 15

but why do i need to do that

Answer 16

you did your\[(\frac{ s_1 }{ s_2 })^3\]the wrong way

Answer 17

how can\[(\frac{ 0.875 }{ 7 })^3 = 1/2\]

Answer 18

no i want to find the ratio for the sides
which is s1/s2

Answer 19

so I cube root the volume

Answer 20

i know but you made a calculation error there

Answer 21

but \[\sqrt[3]{\frac{ 0.875 }{ 7}} = \frac{ 1 }{ 2}\]

Answer 22

yup

Answer 23

then why is it a calculation error

Answer 24

i thought you cube that 0.875/7

Answer 25

ohhhh

Answer 26

anyways so I found the ratio of a side on the smaller solid to the corresponding side on the larger solid which is 1:2 but the answers say that it is 15:16

Answer 27

they are asking for ratio of surface area

Answer 28

not ratio of sides

Answer 29

weird stuff!

Answer 30

it says to do both

Answer 31

if the ratio of side is 15/16 then ratio of area is (15/16)^2

Answer 32

why?

Answer 33

http://www.bbc.co.uk/schools/gcsebitesize/maths/geometry/congruencysimilarityrev4.shtml