An isosceles triangle has a perimeter of 42\(\text{ cm}\) and its two equal sides are 17\(\text{ cm}\) each. Find the length of the base, determine its perpendicular height, and compute the final area of the triangle.
base \(=\) \(\text{ cm}\)
Height \(=\) \(\text{ cm}\)
Total Area \(=\) \(\text{ cm}^2\)
(Enter the height and Area value round off to nearest hundredth)