Question

A TV is 16 inches tall and 14 inches wide. Calculate the screen's diagonal length. Round to the nearest whole number.


I came up with 22 in and was wrong.

Answer 1

Answer:

21

Step-by-step explanation:

You were close to de answer but you rounded in a wrong way

If we calculate $\sqrt{16^{2} + 14^{2}}$  we get 21.2602916255

We need to round to the nearest whole number, it means that we have we only have two options: 21 or 22

We need to remember the rounding rules:

• If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up
• If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down

We see that 1 is followed by 2, it means that we have to round the number down, so our answer is 21