A rectangle is 80cm long and 20cm wide. . Find, to the nearest degree,
the acute angle formed at the intersection of the diagonals.
A *-------------------------------* B
| * * |
| * * |
| * E * θ |
20 | * - - - - - - - * F 20
| * * θ |
| * * |
| * θ * |
D *-------------------------------* C
80