2: Reasoning in Geometry
2.5: Angle Relationships
Investigating Angle Theorems - Activity A
Investigating Angle Theorems - Activity B
3: Using tools of Geometry
3.1: Duplicating Segments and Angles
Constructing Congruent Segments and Angles
3.3: Constructing Perpendiculars to a Line
Construct Parallel and Perpendicular Lines
3.5: Constructing Parallel Lines
Construct Parallel and Perpendicular Lines
3.7: Constructing Points of Concurrency
Concurrent Lines, Medians, and Altitudes
4: Discovering and proving Triangle Properties
4.1: Triangle Sum Conjecture
Triangle Angle Sum - Activity A
4.2: Properties of Isosceles Triangles
Isosceles and Equilateral Triangles
4.3: Triangle Inequalities
Triangle Inequalities
4.4: Are There Congruence Shortcuts?
Proving Triangles Congruent
4.5: Are There Other Congruence Shortcuts?
Proving Triangles Congruent
4.8: Proving Special Triangle Conjectures
Bisectors in Triangles
Concurrent Lines, Medians, and Altitudes
5: Discovering and Proving Polygon Properties
5.1: Polygon Sum Conjecture
Polygon Angle Sum - Activity A
5.3: Kite and Trapezoid Properties
Classifying Quadrilaterals - Activity B
5.5: Properties of Parallelograms
Parallelogram Conditions
5.6: Properties of Special Parallelograms
Special Quadrilaterals
6: Discovering and Proving Circle Properties
6.2: Chord Properties
Chords and Arcs
6.3: Arcs and Angles
Inscribing Angles
6.5: The Circumference/Diameter Ratio
Circle: Circumference and Area
7: Transformations and Tessellations
7.1: Transformations and Symmetry
Reflections
Rotations, Reflections and Translations
Translations
8: Areas
8.1: Areas of Rectangles and Parallelograms
Area of Parallelograms - Activity B
Rectangle: Perimeter and Area
8.2: Areas of Triangles, trapezoids, and Kites
Area of Parallelograms - Activity A
8.5: Areas of Circles
Circle: Circumference and Area
Perimeter, Circumference, and Area - Activity A
8.7: Surface Area
Surface and Lateral Area of Prisms and Cylinders
Surface and Lateral Area of Pyramids and Cones
9: The Pythagorean Theorem
9.1: The Theorem of Pythagoras
Geoboard: The Pythagorean Theorem
Pythagorean Theorem - Activity A
9.2: The Converse of the Pythagorean Theorem
Pythagorean Theorem - Activity B
9.5: Distance in Coordinae Geometry
Distance Formula - Activity A
10: Volume
10.2: Volume of Prisms and Cylinders
Prisms and Cylinders - Activity B
10.3: Volume of Pyramids and Cones
Pyramids and Cones - Activity B
10.5: Displacement and Density
Archimedes' Principle
Determining Density via Water Displacement
11: Similarity
11.1: Similar Polygons
Dilations
Similar Figures - Activity A
Similar Polygons
Similarity in Right Triangles
11.4: Corresponding Parts of Similar Triangles
Perimeters and Areas of Similar Figures
11.5: Proportions with Area
Perimeters and Areas of Similar Figures