So this is my work so far:
Rectangle 1: Length: 10 cm; Height: 7 cm
Rectangle 2 and 3: Length: 6 cm; Height: 8 cm
I am getting confused on the question is that the rectangles have different side lengths and the formula is base times width times height. What I'm confused on is what would the base be? I thought it was ten but I am having trouble understanding what the base is. I have mastered this but I am still confused on what I would be. Cause when we had done surface area it wasn't with 3D shapes.
