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What is the difference between regular convex and concave polygons

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy