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Home > AC > Chapter 6 > Lesson 6.1.1 > Problem 6-7


Solve the problem below by defining a variable and then writing and solving an equation.  

The perimeter of a triangle is cm. Sides and have equal length, while Side is one centimeter shorter than twice the length of Side . How long is each side?

What must you guess and what must you check? Guess side 1 and check that the perimeter What is the relationship between side 1 and the other sides?


Make sure the sides sum to .

What is the length of Side ?