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Home > GC > Chapter 2 > Lesson 2.2.2 > Problem 2-72

2-72.

For each diagram below, solve for x. Explain what relationship from your Angle Relationships Toolkit you used for each problem. 

Refer to the Math Notes box.

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.