Calculate Areas of Sectors

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Presentation transcript:

Calculate Areas of Sectors Silent Teacher Intelligent Practice Narration Your Turn 3 cm 9 cm 30 cm 36° 26° 260° Practice

9cm 12cm 120° 120° Calculate the area of the sector Worked Example Your Turn Calculate the area of the sector Calculate the area of the sector 9cm 12cm 120° 120° @webstermaths

9 cm 30 cm 36° 26° 3 cm 10 cm 36° 260° 36 cm 10° 3 cm 110° 72 cm 10° Calculate the areas of the sectors 9 cm 30 cm 36° 26° 3 cm 10 cm 36° 260° 36 cm 10° 3 cm 110° 72 cm 10° 36 cm 20° @webstermaths

8.1𝜋 cm = 25.4 cm² 65𝜋 cm = 204 cm 9 cm 30 cm 36° 26° 3 cm 10 cm Calculate the lengths of the arcs 8.1𝜋 cm = 25.4 cm² 65𝜋 cm = 204 cm 9 cm 30 cm 36° 26° 3 cm 10 cm 10 𝜋 cm = 3.14 cm² 36° 13 2 𝜋 cm = 20.4 cm 260° 36 𝜋 cm = 113 cm² 36 cm 10° 3 cm 110° 144 𝜋 cm = 452 cm 11 4 𝜋 cm = 8.64 cm 72 cm 10° 72 𝜋 cm = 226 cm 36 cm 20° @webstermaths