What is the construction method that uses thin sheets of wood glued together at right angles?

The correct answer is plywood, which is specifically constructed by layering thin sheets of wood, known as veneers, glued together. These veneers are typically arranged with the grain of each layer running perpendicular to the adjacent layers. This method enhances the strength and stability of the resulting material, making plywood resistant to warping and splitting compared to solid wood.

The unique cross-grain configuration not only increases durability but also reduces the likelihood of excessive expansion or contraction due to moisture changes, which is a common issue with other types of wood products. Plywood is widely used in various construction and furniture-building applications because of its versatility and strength.

The other options, while they involve wood products, do not utilize the same method of construction. Composite board typically refers to manufactured boards made from different types of materials combined together, laminate refers to a surface layer that may cover a base material but does not involve stacking wood sheets at right angles, and chipboard consists of wood chips and fibers compressed together, lacking the layering technique that defines plywood.