Question

Find the area of a square whose perimeter is 128 cm​

Answer 1

Diagram:-

`\setlength{\unitlength}{2mm}\begin{picture}(10,10)\linethickness{0.5mm}\put(6,2){\dashbox{0.01}(15,15)}\put(3,0){\bf D}\put(3,18){\bf A}\put(23,18){\bf B}\put(23,0){\bf C}\end{picture}`

Perimeter of a square =128cm

Let

the side of the square =a

• As we know that in a square

`\boxed{\sf Perimeter=4a}`

• Substitute the values

`\hookrightarrow\sf 4a=128`

`\hookrightarrow\sf a=\frac {128}{4}`

`\hookrightarrow\bf a=32`

• Side=32cm

We know that in a square

`\boxed {\sf Area=(a)^2}`

• Substitute the values

`\hookrightarrow\bf Area=1024cm^2`

`\therefore\sf Area\:of\:the\:square\;is\:1024cm^2.`