Identify and determine values of angles in complementary and supplementary relationships.
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Students studied angles in fourth grade, where they recognized angles as shapes formed when two rays share a common endpoint. They understood that angle measures are additive, and they solved addition and subtraction problems to find missing angles. In this lesson, students formally define complementary and supplementary angles, and they start to develop their understanding of angle relationships and how they can represent these relationships using equations.
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Use the diagram below to answer the questions.
Points $$Q$$, $$R$$, and $$T$$ lie on a straight line, as shown below. Find the measure of $$\angle SRT$$.
Angle $${ABC}$$ is a right angle. Find the value of $$x$$.
In the diagram below, point $$P$$ lies on line $${QT}$$.
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The following resources include problems and activities aligned to the objective of the lesson that can be used to create your own problem set.
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In the diagram below, point $$A$$ lies on line $${BD}$$ and $$\angle CAE$$ is a right angle.
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