What is the perimeter of the polygon formed when the points $A(-6,6), B(9,6)$ and $C(9,-2)$ are graphed and connected with straight lines?
Because AB and BC are horizontal and vertical lines,
AB = 9 - (-6) = 15 units
BC = 6 - (-2) = 8 units
By Pythagorean theorem,
AC = \(\sqrt{8^2 + 15^2}\) = 17 units
The perimeter is 8 + 15 + 17 = 40 units
