# If the height of a computer screen is 7 in. & the width is 11 in. what is the length of the diagonal? Round to the nearest inch?

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- Engr. RonaldLv 72 months ago
Apply pythagorean theorem

c = √(a^2 + b^2)

c = √(7^2 + 11^2)

c = √(170) or 13 in answer//

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- RRLv 72 months ago
Use Pythagoras. The square on the hypotenuse = sum of squares on the other two sides.

In this case, the diagonal is the hypotenuse:

7^2 + 11^2 = h^2

49 + 121 = h^2

170 = h^2

h = 13 inches

- Bill-MLv 72 months ago
7 squared =49; 11 squared = 121;......49+121 = 170;....square root of 170 = 13.0384

- ?Lv 72 months ago
Use the Pythagorean theorem: A²+B² = C² where A and B represent the sides of a right triangle, and C represents the diagonal.

7² + 11² = C²

C² = 170

C = √170

C = 13.04

C ≈ 13 inches (rounded)............ANS

(See below)

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13 not 12