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right angle image Rosalinda examined the angles at right and wrote the equation below. Homework Help ✎

  1. Does her equation make sense? If so, explain why her equation must be true. If it is not correct, determine what is incorrect and rewrite the equation.

  • Is a right angle (as illustrated above), equal to 90°?

    Yes. This means Rosalinda's equation makes sense, because the two angles make up a 90° angle.

  1. If you have not already done so, solve her equation, clearly showing all your steps. What are the measures of the two angles?

  • Refer to the Math Notes box in Lesson 1.1.4 if you need help remembering how to solve a linear equation.

  1. Verify that your answer is correct.

  • After solving for x, substitute your answer into the original equation to verify it is correct.