Chapter 1: Basics of Geometry  
                   Mrs. Endicott Lesson Plans 
   Geometry Lesson 1.1: Points, Lines, and Planes 
   Essential Question: How can you use dynamic geometry software to visualize geometric concepts? 
   Lesson Objective(s): Students will name points, lines, and planes.  Students will name segments and rays.  
   Students will sketch intersections of lines and planes.  Students will solve real-life problems involving 
   lines and planes. 
   New Vocabulary: undefined terms, point, line, plane, collinear points, coplanar points, defined terms, line 
   segment, segment, endpoints, ray, opposite rays, intersection 
   CC State Standards HSG-CO.A.1 
   CC Mathematical Practice Focus MP3, MP4, MP5 
   Geometry Lesson 1.2: Measuring and Constructing Segments 
   Essential Question: How can you measure and construct a line segment? 
   Lesson Objective(s): Students will use the Ruler Postulate.  Students will copy segments and compare 
   segments for congruence.  Students will use the Segment Addition Postulate. 
   New Vocabulary: postulate, axiom, coordinate, distance, construction, congruent segments, between 
   CC State Standards HSG-CO.A.1 HSG-CO.D.12  
   CC Mathematical Practice Focus MP1, MP2, MP5, MP6 
   Geometry Lesson 1.3: Using Midpoint and Distance Formulas 
   Essential Question: How can you find the midpoint and length of a line segment in a coordinate plane? 
   Lesson Objective(s): Students will find segment lengths using midpoints and segment bisectors.  Students 
   will use the Midpoint Formula.  Students will use the Distance Formula. 
   CC State Standards HSG-CO.D.12 HSG-GPE.B.7  
   CC Mathematical Practice Focus MP1, MP2, MP5 
   Geometry Lesson 1.4: Perimeter and Area in the Coordinate Plane  
   Essential Question: How can you find the perimeter and area of a polygon in a coordinate plane?  
   Lesson Objective(s): Students will classify polygons. Students will find perimeters and areas of polygons 
   in the coordinate plane.  
   Previous Vocabulary: polygon, side, vertex, n-gon, convex, concave 
   CC State Standards HSG-GPE.B.7 HSG-MG.A.1 CC 
   Mathematical Practice Focus MP1, MP3, MP6, MP7 
                   Chapter 1: Basics of Geometry  
                   Mrs. Endicott Lesson Plans 
   Geometry Lesson 1.5: Measuring and Constructing Angles 
    Essential Question: How can you measure and classify an angle?  
   Lesson Objective(s): Students will name angles. Students will measure and classify angles. Students will 
   identify congruent angles. Students will use the Angle Addition Postulate to find angle measures. Students 
   will bisect angles.  
   New Vocabulary: angle, vertex, sides of an angle, interior of an angle, exterior of an angle, measure of an 
   angle, acute angle, right angle, obtuse angle, straight angle, congruent angles, angle bisector 
   CC State Standards HSG-CO.A.1 HSG-CO-D.12 CC  
   Mathematical Practice Focus MP5, MP6 
   Geometry Lesson 1.6: Describing Pairs of Angles 
    Essential Question: How can you describe angle pair relationships and use these descriptions to find 
   angle measures?  
   Lesson Objective(s): Students will identify complementary and supplementary angles. Students will 
   identify linear pairs and vertical angles.  
   New Vocabulary: complementary angles, supplementary angles, adjacent angles, linear pair, vertical 
   angles 
   CC State Standards HSG-CO.A.1 CC Mathematical Practice Focus MP3, MP6