Скачать или смотреть Area of Shaded Figure 1 (solve via elementary algebra)

I saw this problem being solve in primary 5 here in Singapore and to be honest even I myself as an Electrical Engineer graduate had a hard time of solving this. I did the step by step elementary procedure. Wherein I analyze the drawing myself and arriving at this solution. I also solved this problem using Heron's Formula a trigonometric formula and I solved it in simplest form. So I am posting this to give you an idea on how to approach the problem. Also i made separate video on this on how to solve this using higher math which make it easy to solve. Wait for the next video. Or I will post the link here after i made the video.


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