Question

Need help with the question at the top

Thanks

Answer 1

First we must find area of a single square.

Meaning we divide total area of 80 centimetres squared by 5 since we have 5 squares in the shape.

$A_{square}=\frac{A_{shape}}{5}=\underline{16}$

Now from the picture we can see that the perimeter of shape is combined by 4 times 3 times the length of side of 1 square.

So we need to find side of 1 square.

$a=\sqrt{A_{square}}=\sqrt{16}=\underline{4}$

As we stated before the formula for perimeter of this shape is:

$P=4(3\cdot a)=4(3\cdot4)=4\cdot12=\boxed{48}$

The perimeter of shape is 48 centimetres.

Hope this helps.

r3t40