To solve this problem, we will need to perform several different actions. First, in this task we need the formula for the area of a rectangle. It looks like this:
S = a * b
First, we need to know the width of the rectangle. It will be expressed like this:
b = 28: 7 = 4 (cm) – width.
Now we can substitute the given values into the formula and find out the area of the given rectangle. We get the following expression:
S = 28 * 4 = 112 (cm²) – the area of the rectangle ABCD.
Answer: 112 cm².
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