(a) Through Lots. On lots extending from one street to another a front yard is required on each street.
(b) Side Yard of a Corner Lot. The side yard of a corner lot which abuts a street shall be no less than the required front yard for that street.
(c) Corner Lots. No obstruction to vision such as buildings, fences, trees, plants or signs exceeding two feet in height shall be erected or maintained on any lot within the triangle formed by the street intersection, created by the right-of-way line of each street extended to a point and a line drawn between two points each located twenty-five feet from the street intersection. (See Figure 1)