Computer screens and television screens are usually measured by the diagonal of the screen. For example, a screen of size 60 inches would have a diagonal of 60 inches, a width of 52 inches, and a height of 30 inches. Yoselin would like to install a new screen on a shelf that is 17 inches tall and 50 inches wide. She would like the screen to be the largest size that will fit on the shelf. She knows the diagonal and width of the 4 screens listed below. Screen Diagonal Width Height A 15” 13” B 22” 19” C 32” 28” D 40” 35” 1. Use the Pythagorean Theorem to calculate the height of each screen, and complete the table. 2. Which screen is the largest that will fit on Yoselin’s shelf?

1 answer

To find the height of each screen, we can use the Pythagorean Theorem. The relationship can be expressed as follows:

\[ d^2 = w^2 + h^2 \]

where \( d \) is the diagonal, \( w \) is the width, and \( h \) is the height. We can rearrange the equation to solve for height:

\[ h = \sqrt{d^2 - w^2} \]

Now we will calculate the height for each screen:

Screen A:

  • Diagonal = 15 inches
  • Width = 13 inches

\[ h = \sqrt{15^2 - 13^2} = \sqrt{225 - 169} = \sqrt{56} \approx 7.48 \text{ inches} \]

Screen B:

  • Diagonal = 22 inches
  • Width = 19 inches

\[ h = \sqrt{22^2 - 19^2} = \sqrt{484 - 361} = \sqrt{123} \approx 11.09 \text{ inches} \]

Screen C:

  • Diagonal = 32 inches
  • Width = 28 inches

\[ h = \sqrt{32^2 - 28^2} = \sqrt{1024 - 784} = \sqrt{240} \approx 15.49 \text{ inches} \]

Screen D:

  • Diagonal = 40 inches
  • Width = 35 inches

\[ h = \sqrt{40^2 - 35^2} = \sqrt{1600 - 1225} = \sqrt{375} \approx 19.36 \text{ inches} \]

Now let's summarize the results in a table:

| Screen | Diagonal (inches) | Width (inches) | Height (inches) | |--------|-------------------|----------------|------------------| | A | 15 | 13 | 7.48 | | B | 22 | 19 | 11.09 | | C | 32 | 28 | 15.49 | | D | 40 | 35 | 19.36 |

Next, we determine which screen fits Yoselin's shelf, knowing that the maximum height is 17 inches and maximum width is 50 inches:

  • Screen A: Height = 7.48 inches (Fits)
  • Screen B: Height = 11.09 inches (Fits)
  • Screen C: Height = 15.49 inches (Fits)
  • Screen D: Height = 19.36 inches (Does not fit)

Among the screens that fit, the largest screen in terms of diagonal is Screen C at 32 inches.

Thus, the largest screen that will fit on Yoselin’s shelf is Screen C (32 inches).