• #### Angle Bisectors - Concept

##### Math›Geometry›Geometry Building Blocks
How to label an angle bisector; how to use an angle bisector to find a missing variable.
• #### Vertical Angles - Concept

##### Math›Geometry›Reasoning, Diagonals, Angles and Parallel Lines
How to define and identify vertical angles.
• #### SSS and SAS - Problem 3

##### Math›Geometry›Triangles
How to determine if two triangles are congruent by either SSS or SAS.
• #### Equiangular Polygon Sums - Problem 1

##### Math›Geometry›Polygons
How to find the measure of one angle in a regular nonagon.
• #### Equiangular Polygon Sums - Concept

##### Math›Geometry›Polygons
How to find the measure of one angle in any equiangular or regular polygon.
• #### Flowchart Proofs - Problem 1

##### Math›Geometry›Triangles
How to prove that two segments are congruent in a trapezoid with diagonals.
• #### Rhombus Properties - Concept

##### Math›Geometry›Polygons
How to define a rhombus and compare it to a square and rectangle.
• #### Inscribed Angles - Problem 1

##### Math›Geometry›Circles
How to find the measure of an inscribed angle and a missing arc.
• #### Rhombus Properties - Problem 2

##### Math›Geometry›Polygons
How to find the length of diagonals and angles in a rhombus.
• #### Rhombus Properties - Problem 1

##### Math›Geometry›Polygons
How to find the angles in a rhombus created by drawing one diagonal.
• #### Rectangle and Square Properties - Concept

##### Math›Geometry›Polygons
How to define a rectangle and a square.
• #### Tangent Segments to a Circle - Problem 1

##### Math›Geometry›Circles
How to find the lengths of a triangle circumscribed about a circle.
• #### Duplicating a Line Segment - Problem 1

##### Math›Geometry›Constructions
How to double a line segment using a compass and straightedge.
• #### Equiangular Polygon Sums - Problem 2

##### Math›Geometry›Polygons
How to find the number of sides in an equiangular polygon given the measure of one angle.
• #### SSS and SAS - Problem 4

##### Math›Geometry›Triangles
How to use SAS and SSS to determine which triangles are congruent and correctly denote the congruence.
• #### Tangent Segments to a Circle - Concept

##### Math›Geometry›Circles
How to find the length of tangent segments drawn to a circle from the same point.
• #### Equiangular Polygon Sums - Problem 3

##### Math›Geometry›Polygons
How to find the measure of angles in regular polygons that share sides.
• #### Chords and a Circle's Center - Concept

##### Math›Geometry›Circles
How to define a chord; how to describe the effect of a perpendicular bisector of a chord and the distance from the center of the circle.
• #### Duplicating a Line Segment - Problem 3

##### Math›Geometry›Constructions
How to construct an equilateral triangle given one segment.
• #### Tangent Segments to a Circle - Problem 2

##### Math›Geometry›Circles
How to find the measure of an angle formed by a chord drawn between two points of tangency.