Unit Plan 9 Angles and Lines
Grade: 6 | Content Area: Mathematics | Course Name: |
Unit: 10 | Description of Course: During this unit students will learn to measure and classify angles. Students will learn to find angle measures using complementary and supplementary angles. | Approximate Time Needed: 5-8 days |
Learning Targets | Assessments | Instructional Considerations | Instructional Approach | Resources |
9.1 I can solve problems using the relationships between the angles formed by intersecting lines (vertical and adjacent angles). 9.2 I can determine missing angle measures in a triangle using the fact that the sum of the interior angles is 180˚. MN Math Standards 6.3.2.1 6.3.2.2 | Pre-Assessments: Formative Assessments: Benchmark Assessment: | Student Background Knowledge: Understanding of basic angles. Understanding of algebraic expressions and equations. Essential Questions: What are the types of angles? How do you measure angles? What is a triangle? Academic Language: Angles Measurement Interior Content Specific Language: Listed below. | Cross-Content Integration: Architecture projects may require calculating angles to plan and design correctly. | Web Resources: Video links posted on lesson plans Research: Technology Resources: internet device, calculator, protractor Community Resources: |
Content Specific Language:
Acute angles - Acute angles are angles that measure between and up to but not including .
Adjacent - Items that are adjacent are immediately next to each other.
Angle - Angles are formed when two rays have the same endpoint.
Angle Addition Postulate - When two smaller angles form to make a larger angle, the sum of the measures of the smaller angles will equal the measure of the larger angle.
Complementary - Two angles that add up to are called complementary angles.
Exterior angles - An exterior angle is an angle formed when you extend a line from the side of a polygon.
Hypotenuse - The hypotenuse is the longest side of a right triangle, the side opposite of the right angle.
Interior angles - The inside angles connecting the sides of the polygon are called interior angles.
Intersecting lines - Intersecting lines are lines that cross one another.
Leg - The two sides of a right triangle that form the right angle are called the legs of that triangle.
Obtuse angles - Obtuse angles are angles that measure more than but less than .
Perpendicular - When two lines intersect to form four right angles they are called perpendicular. The symbol for perpendicular is .
Protractor - The tool used to measure angles is called a protractor.
Right angle - A right angles is an angle that measures exactly .
Sides - The two rays that form an angle are the sides.
Straight angle - A Straight angle is an angle that measures exactly .
Supplementary angles - Two angles that add up to are called supplementary angles.
Triangle Sum Theorem - The Triangle Sum Theorem states that the three interior angles of any triangle add up to .
Vertex - A vertex is the common endpoint of the two rays that form an angle.
Vertical angles - Vertical angles are congruent angles that are formed by intersecting lines and are directly opposite of each other.