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Home > GC > Chapter 1 > Lesson 1.1.3 > Problem 1-25


Read the Math Notes box for this lesson, which describes how to find the area and perimeter of a shape. Then examine the rectangle at right. If the perimeter of this shape is cm, which equation below represents this fact? Once you have selected the appropriate equation, solve for .  

interior rectangle

right edge

bottom edge

  • The equation for the perimeter is part (c).