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## Main Question or Discussion Point

Need help finding the length of an arc...must be dependent on a specific diameter.

Basically, I want to hang outdoor string lights (I have a rectangular backyard). These lights will be attached to a flexible bar that will go from one fence to another. The height of the fence is 4 feet tall, but I want the center of the arc of the flexible bar to be 8 feet from the ground. The distance from one fence to another is 20 feet.

Please let me know what equation I would use to find the length of the flexible bar of which to hang these lights from, so I know how much to buy at the store.

Thank you

Basically, I want to hang outdoor string lights (I have a rectangular backyard). These lights will be attached to a flexible bar that will go from one fence to another. The height of the fence is 4 feet tall, but I want the center of the arc of the flexible bar to be 8 feet from the ground. The distance from one fence to another is 20 feet.

Please let me know what equation I would use to find the length of the flexible bar of which to hang these lights from, so I know how much to buy at the store.

Thank you