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Mathematics 11 Online
OpenStudy (anonymous):

The figures are similar. The ratio of the lengths of their corresponding sides is 40:45, or 8:9. Find the ratio of their perimeters and the ratio of their areas. The figures are not drawn to scale... (will draw picture below) .. Possible answers.. A) 9:10 and 81:100 .. B) 8.9 and 81:100 .. C) 9:10 and 64:81 .. D) 8.9 and 64:81

OpenStudy (anonymous):

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OpenStudy (andriod09):

do you have all the measurements? because \[\Delta a=40\] and \[\Delta b=45\] don't suffice

OpenStudy (anonymous):

thats all that was give.

OpenStudy (andriod09):

okay, so if the ratio is \[8:9\] then what do you need to find out \[\Delta b?\]

OpenStudy (anonymous):

you need to find out the ara but dont you multiply 40 x 40 for that?

OpenStudy (andriod09):

yes. you do, how would the equation look?

OpenStudy (anonymous):

for the 40 x 40 it would be 1600 and for 45 x 45 = 2025 & I ve to go to my next class now

OpenStudy (andriod09):

okay, ill help you later, give me a medal?

OpenStudy (anonymous):

I got it... it was D

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