Forget about the orange and white regions. Replace them with a single color and mentally remove the big circle line. It should make things easier...

I am always amazed at what Pr School kids are expected to achieve, academically.
Singapore will conquer the world!~~

south_korea_ln

science

[Not-so-daily puzzle] Area of a diamond

I feel like this is a problem that can appear on the Pri Sch Leaving Exam Maths paper for my country haha.

Thanks for posting it. I confess that I couldn’t make head or tail out of it 