Answer:
1
Explanation:
a triangle has three sides and three angles and a rectangle has 4 sides so the formula is n-3 . no in this case equals 4 so 4-3=1
D - Nobel Prize in Literature
During the Industrial Revolution, it was common for children to work in factories, mines, and other industrial occupations. Children as young as four commonly worked. ... Working on dangerous machinery had its consequences as many children were injured in accidents.