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2-77.

Daniel and Mike were having an argument about where to place a square in the Venn diagram below. Daniel wants to put the square in the intersection (the region where the two circles overlap). Homework Help ✎

Mike doesn’t think that’s right. “I think it should go in the right region because it is a square, not a rectangle.

But a square IS a rectangle!” protests Daniel. Who is right? Explain your thinking.

Review the definition of a rectangle. Does a square fit this definition?

Daniel is correct because the definition of a rectangle is a quadrilateral with four right angles. Since a square has four sides and four right angles, it must be a rectangle.