3. A cat, sitting on the top of a 9,5 m tree, spots a dog and a firefighter, both on the flat ground below. The cat observes the dog at an angle of depression of 70° south of the tree and the firefighter at an angle of depression 30° east of the tree. Partially completed diagram is shown. C a) Fully label the diagram, show all given angles and right angles, b) Is DTF a right triangle? Explain how you know. c) Determine how far the firefighter is from the dog, to the nearest tenth of metre,

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