Problema Solution
Television sets. What does it mean to refer to a 20-10 TV set or 25-in TV set? Such units refer to the diagonal of the screen. A 15-in TV set also has a width of 12 inches. What is its height?
Answer provided by our tutors
use pythagoras theorem
let x be the height
15^2 = 12^2 + x^2
225 = 144 + x^2
x^2 = 225 -144 = 81
x = 9