I claim the ornamental design for an angled base tile, as shown and described.
FIG. 1 is a front isometric view of an angled base tile showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof.
FIG. 6 is a right side elevation view thereof; and,
FIG. 7 is a left side elevation view thereof.
FIGS. 1-7 illustrate broken lines showing a pair of tiles placed above and normal to the present invention, respectively. In FIGS. 2-5, Applicant has removed some of the broken lines to ensure clarity and remove unnecessary clutter. The broken lines showing the rectangular tiles is for the purpose of illustrating how the angled base tile interacts with other tile structures and thus, the broken lines forms no part of the claimed design.