I have missed a week of school and for homework my teacher gave me an assignment with no notes so I have no idea what to do with this. There are no directions on the page, just the title Chord Properties and this diagram along with several others. If someone could show me (or tell me if it is something that would require measurment as this diagram is just a sketch) how to do this example to give me a jumping off point that would be great.

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Have you ever heard of an isosceles triangle?