Answer: The surface area of a rectangular prism can be calculated by finding the area of each face and adding them together.
The rectangular prism has six faces, each of which is a rectangle.
The area of the top and bottom faces is:
8mm x 9mm = 72mm²
The area of the front and back faces is:
8mm x 5mm = 40mm²
The area of the left and right faces is:
5mm x 9mm = 45mm²
To find the total surface area, we add the area of all six faces:
72mm² + 72mm² + 40mm² + 40mm² + 45mm² + 45mm² = 314mm²
Therefore, the surface area of this rectangular prism is 314mm².
Step-by-step explanation: The surface area of a rectangular prism can be calculated by finding the area of each face and adding them together.
The rectangular prism has six faces, each of which is a rectangle.
The area of the top and bottom faces is:
8mm x 9mm = 72mm²
The area of the front and back faces is:
8mm x 5mm = 40mm²
The area of the left and right faces is:
5mm x 9mm = 45mm²
To find the total surface area, we add the area of all six faces:
72mm² + 72mm² + 40mm² + 40mm² + 45mm² + 45mm² = 314mm²
Therefore, the surface area of this rectangular prism is 314mm².