• #### Constructing the Orthocenter - Concept

##### Math›Geometry›Constructions
How to construct the orthocenter of a triangle.
• #### Duplicating an Angle - Concept

##### Math›Geometry›Constructions
How to duplicate an angle using a compass and straightedge.
• #### Duplicating an Angle - Problem 1

##### Math›Geometry›Constructions
How to duplicate an angle using a compass and straightedge.
• #### Constructing the Orthocenter - Problem 1

##### Math›Geometry›Constructions
How to construct the orthocenter of an obtuse triangle.
• #### Constructing the Perpendicular Bisector - Concept

##### Math›Geometry›Constructions
How to construct a midpoint and how to define a perpendicular bisector.
• #### Constructing the Circumcenter - Concept

##### Math›Geometry›Constructions
How to construct the circumcenter using a compass and straightedge.
• #### Duplicating a Line Segment - Concept

##### Math›Geometry›Constructions
How to duplicate a line segment using a compass and straightedge.
• #### Duplicating a Line Segment - Problem 2

##### Math›Geometry›Constructions
How to construct a triangle given three line segments.
• #### Duplicating a Line Segment - Problem 1

##### Math›Geometry›Constructions
How to double a line segment using a compass and straightedge.
• #### Constructing a Perpendicular to a Line - Concept

##### Math›Geometry›Constructions
How to find the shortest distance between a point and a line.
• #### Constructing a Perpendicular to a Line - Problem 1

##### Math›Geometry›Constructions
How to construct a perpendicular through a point not on a line to a line.
• #### Constructing an Angle Bisector - Problem 1

##### Math›Geometry›Constructions
How to construct a 30 degree angle.
• #### Constructing the Perpendicular Bisector - Problem 1

##### Math›Geometry›Constructions
How to draw a perpendicular bisector of a line segment using a compass and straightedge.
• #### Constructing the Perpendicular Bisector - Problem 2

##### Math›Geometry›Constructions
How to create a line segment that is 5/4 of a given segment.
• #### Constructing the Incenter - Problem 1

##### Math›Geometry›Constructions
How to construct the inscribed circle of a triangle using a compass and straightedge.
• #### Constructing the Circumcenter - Problem 1

##### Math›Geometry›Constructions
How to construct the circumscribed circle of a triangle using a compass and straightedge.
• #### Constructing an Angle Bisector - Concept

##### Math›Geometry›Constructions
How to define and construct an angle bisector.
• #### Constructing an Angle Bisector - Problem 2

##### Math›Geometry›Constructions
How to construct a 45 degree angle.
• #### Duplicating a Line Segment - Problem 3

##### Math›Geometry›Constructions
How to construct an equilateral triangle given one segment.
• #### Constructing a Median - Concept

##### Math›Geometry›Constructions
How to define a median in a triangle.