The area of a square is 16cmsq. Find the area of the square joining the mid pt. Of its side.

Gv me sltn

let each side of the original square be 2x

so its area = 4x^2
let each side of the inner square be s
s^2 = x^2 + x^2
s = √2 x
area of inner square = (√2 x)^2 = 2x^2

so the area of the square joining the midpoints is 1/2 of the original.