The rectangular box shown in the figure has dimensions 8" × 7" × 4" (a = 8, b = 7, c = 4). Approximate the angle θ formed by a diagonal of the base and a diagonal of the 7" × 4" side. (Round your answer to two decimal places.)

The rectangular box shown in the figure has dimensions 8 7 4 a 8 b 7 c 4 Approximate the angle θ formed by a diagonal of the base and a diagonal of the 7 4 side class=