Lesson 2: 1-5: Angle Relationships

1. What are perpendicular lines?
2. What kinds of special angle pairs can you name? Sketch an example and nonexample of each.
3. Do complementary or supplementary angles have to be adjacent?

Adjacent Angles
Linear Pair
Vertical Angles
Complementary Angles
Supplementary Angles
Perpendicular

G.CO.1
Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

https://docs.google.com/document/d/1zq0M4k71wKerXCRC7RRT03j2PjfmBImlaTgUCbpHxkw/edit?usp=sharing

Adjacent angles and vertical angles are two types of angle pairs. A linear pair is a special pair of adjacent angles. The properties of angle pairs are used to solve problems related to their angle relationship.

Cheerleaders position their arms and legs at specific angles to create various formations when performing at games and competitions. Certain pairs of angles have special names and share specific relationships.

Students should avoid making certain assumptions about the geometric relationships of figures in a diagram. For example, just because two angles look like they are congruent does not necessarily mean that they are congruent.

Students approaching grade level can be given practice problems in small groups to work with other students or directly with the teacher.
Students beyond grade level can make deeper connections in the following way: student can work in a group to determine if vertical angles can ever be complementary or supplementary.

Formative Assessment

Textbook in class

Access online textbook and resources through class link.