Question

a rectangle has a length of 80 units and a width of 39 units. Find the length of the diagonal.

Answer 1

Equation = a² + b² = c²

a = 80
b = 39
c = Diagonal

a² + b² = c²
80² + 39² = c²
6400 + 1521 = c²
   c² = 7921
   c  = √7921
   c  = 89

 Answer = 89 units