On a non triangle how do you figure the base when it starts grid 1 and angles to 7

To find the base of a non-triangle shape given that it starts at grid 1 and angles to grid 7, you will need to know more information about the shape. The information provided is not enough to accurately determine the base of the shape.

If the shape is a rectangle or a trapezoid, you may need additional measurements or angles to determine the base length. Please provide more information about the shape or clarify the question for a more accurate answer.