Area of shaded regions

Here is problem about area which I’m sure you will enjoy solving. It’s not hard. Just tricky.

Problem

What is the total area of the shaded part of rectangle ACDB?

area of rectangle

As suggested by one of the readers, you should be able to explain why you think you have the correct answer. One way to do it is to be able to set up an expressions for the areas.

Try the problem with your friends before comparing your solution with my solutions.

 

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