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The Cosine Law

See – Look at the GeoGebra applet. Write down what you see happening. Don’t try to explain, just make some observations. List at least three observations here. Think – What do you think is going on? Can you explain what you saw? How are the different observations related? What evidence can you provide for your claims? Wonder – What are you still wondering? What questions do you now have? Has something been left un explained or unobserved?