The diagonal of the TV is 100 cm and the height is 60 cm, find the width of the screen.

It is known that the diagonal of some TV is 100 cm, and its height is 60 cm.
Since the TV has the shape of a rectangle, we use the Pythagorean theorem to calculate its width.
Let’s calculate what the square of the diagonal is equal to:
100² = 10000.
Let’s calculate what the square of the height is:
60² = 3600.
Let’s find the difference between these values, which will be the square of the width:
10000 – 3600 = 6400.
Let’s calculate the width of the TV:
√6400 = 80 cm.
Answer: the TV is 80 centimeters wide.