Question 14
Emily makes the pictured triangular grid from equal sticks. What is the least number of sticks she must remove so that the remaining figure consists only of six small triangles?
Source solution convention: the remaining figure has only six small triangles, with no stray sticks or larger triangles. The erroneous source answer letter is corrected below.
Source solution convention: the remaining figure has only six small triangles, with no stray sticks or larger triangles. The erroneous source answer letter is corrected below.