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- - **Area enclosed by a semi-circle and a quarter circle**
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Area enclosed by a semi-circle and a quarter circle1 Attachment(s) Find the shaded area, which is enclosed by a square, semi-circle and a quarter of circle. [attachment=0:1naeango]shaded area.JPG[/attachment:1naeango] |

Re: Area enclosed by a semi-circle and a quarter circleUsing degree measure for angles, |

Re: Area enclosed by a semi-circle and a quarter circleGot it. Thanks. How do you get cos-1(0.6) and cos-1(-06)? |

Re: Area enclosed by a semi-circle and a quarter circle1 Attachment(s) Angle AGD has a cosine of 3/5 and angle GED has a cosine of -3/5. I found these values with the cosine rule. 1. Calculate the area of the kite ADEG and from that subtract the area of circular sector ADG. 2. Calculate the area of circular sector EDG and from that subtract the result of step 1 and that gives you the shaded area. |

whoa thanks. got the same problem too. :p |

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