A photograph of 11x24cm is placed in a 2cm wide frame. Find the outer perimeter of the frame.

Let’s find the outer perimeter of the frame, knowing that its width is 2 cm, and it is intended for a photograph of 11 x 24 cm. The perimeter is the sum of all sides, we will find the sides of the frame:

11 + 2 = 13 width, height = 24 + 2 = 26.

Rectangle 2 has opposite sides equal, which means:

2 * 13 + 2 * 26 = 26 + 52 = 78 cm.

Answer: The outer perimeter of the frame is 78 cm.