Flashcards
Circles, Arcs and Sectors
Flashcards do conjunto (7)
- 1What is the formula for the area of a circle?pi x radius^2
- 2What is the formula for circumference?2 x r x pi
- 3What is a sector?It is a portion of a circle.
- 4Whta is a radius?Half the diameter of a circle.
- 5State the formula for the perimeter of a sector.(Ɵ/360x 2 x pi x r) x 2r
The part in brackets is the formula to work out the arc length and the 2r represents the sides of the sector. - 6How do you work out an arc length? (State as a formula)Ɵ/360x 2 x pi x r
Ɵ is the angle of the sector. - 7Ɵ of a sector is 60 degrees. The radius is 8 cm. What is the area of the sector?Ɵ/360 x pi x 8^2=
235cm^2
Informações
- Descrição
- AQA IGCSE Maths (EOY exams yr 8) FlashCards sobre Circles, Arcs and Sectors, criado por Emma Boxley em 06-05-2013.
- Criado por
- Emma Boxley
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