Rectilinear Figures, SM-Bank 045 An isosceles triangle has a base of length 4 centimetres and a perimeter of 20 centimetres. Find the length of the equal sides. (2 marks) --- 4 WORK AREA LINES (style=lined) --- Show Answers Only \(8\ \text{cm}\) Show Worked Solution \(\text{Let the length of the equal sides be}\ x\) \(\text{Then,}\ \ 2\times x+4\) \(=20\) \(2x\) \(=20-4\) \(2x\) \(=16\) \(x\) \(=8\) \(\therefore\ \text{The equal sides are of length }8\ \text{cm}\)