Circle Sectors Areas And Arc Lengths Grade 6 Series A video revising the techniques and strategies for working with circle sectors (higher only).video to watch next: circle sectors with trigonometry | grade 7. Calculate the arc length to 2 decimal places. first calculate what fraction of a full turn the angle is. 90° is one quarter of the whole circle (360°). the arc length is \ (\frac {1} {4}\) of.
Gcse Sectors Of Circles And Arc Lengths Youtube For example, the radius of a circle is 4cm.4cm. the area of the circle is π × 4 2 = 16π cm2 = 50.265…cm2π × 42 = 16π cm2 = 50.265… cm2. step by step guide: area and circumference of a circle. circumference of a circle (πd) (π d) (πd) the circumference of a circle can be found by multiplying the diameter by π.π. 1. sector, centre o.radius of the c. angle of the sector is 150°.8 c. 150°o 8 cmcalculate the area of the sector.gi. ures. cm2(total for question 1 is 2 marks)2aob is. sector of a circle, centre o and. cm. the angle of the sector is 12. °.a18 cmcalculate the length. e your answer in terms of π.o 125° 18 cmb3se. Example 2: sector area & arc length. the sector of a circle has centre c as shown. find the area of the sector and the arc length to 1 decimal place. [2 marks] the angle is 120 \degree, which means that this sector is \frac {120} {360} as a fraction of the whole circle. so, we get: \textcolor {blue} {\text {sector area}} = \dfrac {120} {360. A = (θ 360) * π * r². where: θ is the angle (in degrees) of the sector. r is the radius of the circle. for example 2, if the radius is 8 cm and the angle is 90 degrees, the sector area would be: a = (90 360) * π * 8² ≈ 50.27 cm². these formulas are instrumental in solving various problems including those found in the gcse maths steps.
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