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Home > GC > Chapter 4 > Lesson 4.1.1 > Problem 4-8
4-8.
Is Randi’s equation valid? Explain your thinking.
Notice the right angle.
Yes, she used the Pythagorean Theorem.
To solve her equation, first rewrite
by multiplying . You may want to review the Math Notes box for Lesson 2.2.2. Now solve your equation for
. Use a generic rectangle to multiply the binomials.
What is the perimeter of Randi’s triangle?
Use the value of
to determine the length of each side of the triangle.