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8-11.

As Randi starts to solve for in the diagram at right, she writes the equation .

  1. Is Randi’s equation valid? Explain your thinking.

    Notice the right angle.

    Yes, she used the Pythagorean Theorem.

A right triangle with a base of x, a height of 7, and a hypotenuse of x + 1.

  1. What is the perimeter of Randi’s triangle?

    Once you solve the equation you will need to use the value of to determine the length of each side of the triangle.