Final answer:
A jigsaw is a hand-held power tool used in construction for cutting plywood from irregular shape openings for windows. It is versatile and can make curved cuts or intricate shapes.
Step-by-step explanation:
The hand-held power tool primarily used in the construction trade for cutting plywood from irregular shape openings for windows is called a jigsaw. A jigsaw is a versatile tool with a reciprocating blade that moves up and down rapidly to cut through various materials, including wood, plastic, and metal. It is commonly used for making curved cuts or intricate shapes.
For example, if a window opening has an irregular shape that requires a precise cut, a jigsaw can be used to carefully cut the plywood to fit perfectly.
When using a jigsaw, it is important to wear appropriate safety equipment, such as safety glasses and ear protection, and to follow the manufacturer's instructions for safe and proper use.