1. Optimizing Coverage: Security CamerasProjector Resources Optimizing Coverage: Security Cameras Projector Resources

2. Optimizing Coverage: Security CamerasProjector Resources Security Cameras A shop owner wants to prevent shoplifting. He decides to install a security camera on the ceiling of his shop. The camera can turn right round through 360°. The shop owner places the camera at point P, in the corner of the shop. The plan view shows where ten people are standing in the shop. P-1

3. Optimizing Coverage: Security CamerasProjector Resources Plan View P-2

4. Optimizing Coverage: Security CamerasProjector Resources Planning a Joint Solution P-3 1.Take turns to explain your work and how you think it could be improved. 2.Listen carefully to each other and ask questions if you don’t understand or agree. 3.Once everyone in the group has explained their method, plan a joint method that is better than each of your separate ideas. 4.Make sure that everyone in the group can explain the reasons for your chosen method. 5.Write a brief outline of your planned method on your large sheet of paper.

5. Optimizing Coverage: Security CamerasProjector Resources Security Cameras 1.Which people cannot be seen by the camera at P? Explain your answer, showing clearly on the diagram how you know. 2.The shop owner says, “15% of the shop is hidden from the camera.” Show clearly that he is correct. 3.The shop owner decides to move the camera so that it can see as much of the shop as possible. a.Show on the plan view the best place for the camera, so that it can see as much of the shop as possible. b.Explain how you know that this is the best place for the camera. P-4

6. Optimizing Coverage: Security CamerasProjector Resources Sample Responses to Discuss P-5 1.Each choose a sample response to work through and write your answers on your mini-whiteboards. 2.Explain your answers to the rest of the group. 3.Listen carefully to explanations. Ask questions if you don’t understand. 4.Once everyone is satisfied with the explanations, write the answers to the questions below the sample response. 5.Try to ensure that the student who writes the answers is not the student who explained them.

7. Optimizing Coverage: Security CamerasProjector Resources Sample Responses to Discuss: Simon P-6

8. Optimizing Coverage: Security CamerasProjector Resources Sample Responses to Discuss: Ellie P-7

9. Optimizing Coverage: Security CamerasProjector Resources Sample Responses to Discuss: Rhianna P-8