Question

Taylor has attached cross braces diagonally across the backside

of a bookshelf to improve its stability. The horizontal distance
between the ends of each cross brace is 75 centimeters and
the vertical distance is 56 centimeters. Find the length of each
cross brace.
56 cm

Answer 1

Use Pythagorean theorem
a^2 + b^2 = c^2
a^2 + 56^2 = 75^2
a^2 + 3136 = 5625
a^2 = 2489
a = 49.89 cm