what is the answer | Mathematics | Page 1

restive mantle Mar 30, 2024, 2:42 PM

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i think its D but im not sure pls help 😭

halcyon orchidBOT Mar 30, 2024, 2:42 PM

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restive mantle i think its D but im not sure pls help 😭

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indigo wave Mar 30, 2024, 3:06 PM

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@restive mantle do you know about Pythagoras theorem (PGT)??

restive mantle Mar 30, 2024, 5:29 PM

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i do

round dune Mar 30, 2024, 6:32 PM

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restive mantle i think its D but im not sure pls help 😭

As Jagrit said above, Pythagoras' theorem will work here. You know the length of the piece of wood and the initial distance to the wall, so you can also find the initial height.

restive mantle Mar 30, 2024, 7:18 PM

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yes its three

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i already did that

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but then what

round dune Mar 30, 2024, 7:31 PM

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restive mantle yes its three

Let's try solving it generally.
We are given the length l, the initial distance x and the change in height Δy. We need to find the change in length Δx.
Before we move the piece of wood, we have:
x^2 + y^2 = l^2
And after we move it:
(x + Δx)^2 + (y + Δy)^2 = l^2
So:
(x + Δx)^2 + (y + Δy)^2 = x^2 + y^2
Try expressing Δx from here.

#what is the answer