Question

A television set is 36 inches wide and has a diagonal length of 42 inches. To the nearest inch, how tall is the set?

Answer 1

Pythagorean theorem.
36² + b² = 42²
1296 + b² = 1764
-1296. -1296
b² = 468
[square root] b² = [square root] 468
b= height =21.6 inches