# congruent segments   34 videos

• #### Midpoints and Congruent Segments

##### GeometryGeometry Building Blocks

How to identify, define and label a midpoint.

congruent segments bisect
• #### Duplicating a Line Segment

##### GeometryConstructions

How to duplicate a line segment using a compass and straightedge.

congruent segments construction compass straightedge
• #### Tangent Segments to a Circle

##### GeometryCircles

How to find the length of tangent segments drawn to a circle from the same point.

tangent congruent segments inscribed circle
• #### Area of a Segment

##### GeometryArea

How to derive the area of a segment formula.

• #### Line Segments

##### GeometryGeometry Building Blocks

How to define and label a line segment.

line endpoint points
• #### Parametrizing a Line Segment

##### PrecalculusVectors and Parametric Equations

How to write the parametric equations of a line segment that goes from point A to point B.

vector equation line segment parametric equations
• #### CPCTC

##### GeometryTriangles

How to use the principle that corresponding parts of congruent triangles are congruent, or CPCTC.

corresponding parts or congruent triangles proofs
• #### Proportional Segments Between Parallel Lines

##### GeometrySimilarity

How to prove two triangles are similar using a line parallel to a base.

parallel lines triangles similar triangles proportion
• #### Constructing a Median

##### GeometryConstructions

How to define a median in a triangle.

midpoint vertex segment median
• #### Constructing a Triangle Midsegment

##### GeometryConstructions

How to define a midsegment in a triangle.

midpoint segment median
• #### Angle Bisectors

##### GeometryGeometry Building Blocks

How to label an angle bisector; how to use an angle bisector to find a missing variable.

congruent angles ray
• #### Vertical Angles

##### GeometryReasoning, Diagonals, Angles and Parallel Lines

How to define and identify vertical angles.

vertex intersecting lines congruent
• #### Why SSA and AAA Don't Work as Congruence Shortcuts

##### GeometryTriangles

How to determine which congruence shortcuts do not work and why.

congruent triangles shortcuts
• #### Central Angles and Intercepted Arcs

##### GeometryCircles

How to define a central angle and find the measure of its intercepted arc; how to describe the intercepted arcs of congruent chords.

chord central angle intercepted arc arc measure congruent chords side side side shortcut
• #### Similar Triangles

##### Pre-AlgebraIntroductory Geometry

Overview of similarity: congruent angles, proportional corresponding sides

• #### Cyclic Quadrilaterals and Parallel Lines in Circles

##### GeometryCircles

How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle.

inscribed angles cyclic quadrilaterals parallel lines alternate interior angles
• #### The Midpoint and Distance Formulas in 3D

##### PrecalculusVectors and Parametric Equations

How to derive the formula for the midpoint of a segment in three dimensions.

position vectors the vector from point a to point b the midpoint formula vector addition scalar multiplication
• #### Duplicating an Angle

##### GeometryConstructions

How to duplicate an angle using a compass and straightedge.

congruent angles construction compass straightedge
• #### Equiangular Polygon Sums

##### GeometryPolygons

How to find the measure of one angle in any equiangular or regular polygon.

equiangular regular congruent triangles sum
• #### Distance Formula

##### GeometryPythagorean Theorem

How to derive the equation for the distance between two points using the Pythagorean Theorem.

distance coordinate plane ordered pair segment