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Triangle with dashed sides, each vertex labeled, tree, & each side labeled, 20 ft.Beth is working on a design for her garden.  She plans to purchase three young olive trees that will need to be watered early in the morning.  She needs to plant the trees feet apart so they have room to grow, as shown at right.

She has one rotating sprinkler attached to a timer.  She wants to place the sprinkler so that it will reach all three trees, but not waste a lot of water.  Make a sketch of the situation and describe how Beth should determine where to place the sprinkler.  

Use the glossary to review centroid, incenter and circumcenter.