| Exam Board | OCR MEI |
|---|---|
| Module | C2 (Core Mathematics 2) |
| Year | 2012 |
| Session | June |
| Marks | 5 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Radians, Arc Length and Sector Area |
| Type | Sector area calculation |
| Difficulty | Moderate -0.3 This is a straightforward application of the sector area formula A = ½r²θ, requiring algebraic rearrangement to find r, then using r and θ to calculate perimeter (2r + rθ). Standard C2 question with clear given values and routine calculations, slightly easier than average due to direct formula application. |
| Spec | 1.05d Radians: arc length s=r*theta and sector area A=1/2 r^2 theta |
5 A sector of a circle has angle 1.6 radians and area $45 \mathrm {~cm} ^ { 2 }$. Find the radius and perimeter of the sector.
\hfill \mbox{\textit{OCR MEI C2 2012 Q5 [5]}}