### Home > CC4 > Chapter 3 > Lesson 3.2.1 > Problem 3-81

3-81.

*ABCD* at right on graph paper. 3-81 HW eTool (Desmos) Homework Help ✎.

Rotate rectangle

*ABCD*90° counterclockwise (↺) about the origin to create rectangle*A*′*B*′*C*′*D*′. Name the coordinates of*C*′.Reflect rectangle

*ABCD*across the vertical line*x*= 1 to create rectangle*A*″*B*″*C*″*D*″. Name the coordinates of*C*′′.Translate rectangle

*ABCD*so that*C*is moved 5 units down and 12 units right. Name the coordinates of*C*′′′. How is this transformation related to the line?What is the area of rectangle

*ABCD*?

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