Question 12
An uses equilateral triangles of side 1 cm to make the first sequence of larger triangles. Bình uses squares of side 1 cm to make the second sequence of larger squares. Each sequence begins with 1, 4, 9 and 16 small pieces, as shown.
Each child chooses one shape from their sequence. The sum of the two perimeters is 50 cm. What is the greatest possible number of small triangles in An’s shape?
Each child chooses one shape from their sequence. The sum of the two perimeters is 50 cm. What is the greatest possible number of small triangles in An’s shape?