Answer:
They have to do calculations and take measurements.
Step-by-step explanation:
Measurements can be defined as the process which typically involves the process of identifying and determining the dimensions of a physical object. The dimensions include important parameters such as width, height, length, area, volume, circumference etc.
Since carpenters are saddled with the responsibility of constructing objects such as chairs, tables, stools, etc having various shapes and sizes, it is very important and essential that they have a good understanding (knowledge) of mathematics.
Hence, carpenters require an understanding and knowledge of mathematics because they have to do calculations and take measurements.