Question

PLEASE HELP ASAP IM FREAKING OUT

Answer 1

30 cm

Explanation:

Make sure all units are the same!

P = Perimeter

A = Area

Formula used for similar figures:

`(A_(1))/(A_(2)) = ((l_(1))/(l_(2)))^(2)` —- eq(i)

`(P_(1))/(P_(2)) = (l_(1))/(l_(2))` ———— eq(ii)

Applying eq(ii):

∴
`(25)/(P_(2)) = (10)/(12)`

Cross-multiplication is applied:

`(25)(12) = 10P_(2)`

`300 = 10P_(2)`

`P_(2)` has to be isolated and made the subject of the equation:

`P_(2) = (300)/(10)`

∴Perimeter of second figure = 30 cm