Answer: The formula to find the area of a rhombus is b • h, which is simply base (b) times the height (h). In this case, the base is 10 1/2 in. and the height is 10 inches. So, you can then multiply the two numbers together. Eventually, you’ll end up with the answer 105 in^2. In other words, it would be 105 inches squared. Hope that helps!