March 17, 2020
Problem of the Week
Tuesday, March 17, 2020
Triangles are added on in a clockwise direction to create the spiral of triangles shown below. If the length of the sides of the triangles in the given pattern are given by the sequence 1, 1, 1, 2, 2, 3 ..., what is the length of the side of the 20th triangle in this sequence?
