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Lesson objective: Apply knowledge of angle construction and measurement to a realworld problem.
This lesson provides an opportunity for students to apply their knowledge and understanding of angle measurement to a reallife situation. Students are asked to construct a triangular path that a robot will travel given a set of directions that include turning on a specific angle.
Key Concept students will use:

Points, lines, line segments, and rays have specific properties that are maintained when combined to make geometric figures. One of these new figures, an angle, is a geometric figure that is created wherever two rays share a common endpoint.

An angle is measured in reference to two rays that intersect the center point of a circle. An angle that turns through 1/360th of a circle is called a onedegree angle.

An angle that turns through n onedegree angles is said to have a measure of n degrees.
Skills students will use:
 Exploring standard units of length; (Grade 2, Unit 2)
 Solving problems involving shapes; (Grade 3, Unit 13)
Students engage in Mathematical Practice 5 (Use appropriate tools strategically) as they use a ruler, protractor, and other materials to construct angles.
Key vocabulary:
 acute angle
 angle
 measure
 obtuse angle
 point
 protractor
 ray
 right angle
 vertex
Special materials needed:
 AngLegs (optional)
 protractor
 ruler