Solve for the missing side length

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6

Step-by-step explanation:

Let the missing side be represented as x.

Applying the triangle proportionality theorem, we have:

Solve for x

Cross multiply

Divide both sides by 10

x = 6

23

Step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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