Question

My tv has a length of 78.4 inches and a width of 44.1 inches. If I wanted to sell my tv, what single-number size should I list it as?

Answer 1

89.9 inches

Explanation:

√(78.4)²+(44.1)² =√6146.56 + 1944.81

=√8091.37= 89.9 inches