A triangular pennant has two sides the same length. The third side is 9 in. shorter than either of the equal sides. The perimeter of the pennant is 57 in. How long is the shortest side?

Question

A triangular pennant has two sides the same length.  The third side is 9 in. shorter than either of the equal sides.  The perimeter of the pennant is 57 in.  How long is the shortest side?

Ms. Sue · Answer

Let x = a longer side 2x + x - 9 = 57 3x = 57 + 9 3x = 66 x = 22

Kaylee Harmon · Answer

Let x = a longer side 2x + x - 9 = 57 3x = 57 + 9 3x = 66 x = 22 22 - 9 = 13 The shorter side is 13 inches long.