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Siâp a Gofod / Shape and Space

Siâp a Gofod / Shape and Space. SECTOR CYLCH / SECTOR OF CIRCLE. ARWYNEBEDD SECTOR A HYD ARC AREA OF SECTOR AND ARC LENGTH. Mae modd canfod arwynebedd a hyd arc unrhyw sector o gylch It’s possible to find the area and arc length of any sector of the circle Enghraifft / Example

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Siâp a Gofod / Shape and Space

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  1. Siâp a Gofod / Shape and Space SECTOR CYLCH / SECTOR OF CIRCLE

  2. ARWYNEBEDD SECTOR A HYD ARCAREA OF SECTOR AND ARC LENGTH • Mae modd canfod arwynebedd a hyd arc unrhyw sector o gylch • It’s possible to find the area and arc length of any sector of the circle • Enghraifft / Example • Chwarter cylch = 90° Radiws = 5cm • Quarter circle = 90° Radius = 5cm 5cm

  3. ARWYNEBEDD SECTOR A HYD ARCAREA OF SECTOR AND ARC LENGTH • Mae modd canfod arwynebedd a hyd arc unrhyw sector o gylch • It’s possible to find the area and arc length of any sector of the circle • Enghraifft / Example • Hanner cylch = 180° Radiws = 7.2cm • Half of a circle = 180° Radius = 7.2cm 7.2cm

  4. 7.8cm 3.5cm 5cm 2.3cm 4.9cm 8.8cm 9.5cm 7.1cm 9.9cm YMARFERION / EXERCISES • Cyfrifwch arwynebedd a hyd arc y canlynol • Calculate the area and arc length of the following 2.3cm

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