If you want to know how far it is from point a of the roof you are on to point B of the roof of the building across the street. The buildings are the same height. A. Explain how to use triangles to find AB. Draw the diagram showing the additional points you Will use.

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step-by-step explanation:

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step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.