The 2nd Quiz Of Circles

Find the formula to get the circumferences and areas of the following shaded area

1. Given that a square that length of width is a cm, how to find circumference and areas of shaded area ?

a cm

2. Given that a square that length of width is a cm, how to find circumferences and areas of shaded area ?

a cm

3. Given that two circles like beside ficture, and then the length of OB is a cm, and the length of OA is b cm how to find circumferences and areas of shaded area ?

4. Given that a square that length of width is a cm, how to find circumference and areas of shaded area ?

a cm

5. Given that a square that length of width is a cm, how to find circumference and areas of shaded area ?

6. Given that a square that length of width is a cm, how to find circumferences and areas of shaded area ?

These all for this Time

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