Question

A computer monitor is listed as being 17 inches. This is the diagonal across the screen. If the screen measures 10 inches in height, what is the actual width of the screen to the nearest inch?

Answer 1

diagonal = sqrt(l^ + w^2)

17 = sqrt(10^2 + x^2)

17^2 = 10^2 + x^2

289 = 100 + x^2

189 = x^2

x = sqrt(189) = 13.747

X = 13.75

width is 13.75 inches