Answer:
14.4 inches
Step-by-step explanation:
The horizontal distance between the ends of the diagonal is 12 inches. The vertical distance is 8 inches. The Pythagorean theorem tells you the diagonal length is ...
... d² = h² +v² . . . . . Pythagorean theorem related to horizontal (h) and vertical (v) legs of the right triangle
... d = √(h² +v²) . . . . take the square root
Fill in the numbers:
... d = √((12 in)² +(8 in)²) = √208 in ≈ 14.4 in