24 Videos for "congruent triangles"

CPCTC  Concept
Math › Geometry › Triangles
How to use the principle that corresponding parts of congruent triangles are congruent, or CPCTC. 
Two Column Proofs  Problem 1
Math › Geometry › Triangles
How to use a two column proof to show that two triangles are congruent. 
Two Column Proofs  Problem 3
Math › Geometry › Triangles
How to use a two column proof to show that two angles are congruent with overlapping triangles. 
Two Column Proofs  Problem 4
Math › Geometry › Triangles
How to use a two column proof to show that two sides are congruent with overlapping triangles. 
Two Column Proofs  Problem 2
Math › Geometry › Triangles
How to use a two column proof to show that two angles are congruent in a parallelogram with one diagonal. 
HL  Problem 3
Math › Geometry › Triangles
How to solve for a variable to make two right triangles congruent using the HL shortcut. 
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. 
Two Column Proofs  Concept
Math › Geometry › Triangles
How to organize a two column proof. 
Why SSA and AAA Don't Work as Congruence Shortcuts  Concept
Math › Geometry › Triangles
How to determine which congruence shortcuts do not work and why. 
Similar Triangles  Concept
Math › PreAlgebra › Introductory Geometry
Overview of similarity: congruent angles, proportional corresponding sides 
Flowchart Proofs  Problem 1
Math › Geometry › Triangles
How to prove that two segments are congruent in a trapezoid with diagonals. 
Center and Apothem of Regular Polygons  Concept
Math › Geometry › Area
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles. 
Central Angles and Intercepted Arcs  Problem 1
Math › Geometry › Circles
How to find missing angles of triangles formed by radii to congruent chords. 
Inscribed Angles  Problem 2
Math › Geometry › Circles
How to find the measure of intercepted arcs, given the vertex angle of an inscribed isosceles triangle. 
Equiangular Polygon Sums  Concept
Math › Geometry › Polygons
How to find the measure of one angle in any equiangular or regular polygon. 
Equiangular Polygon Sums  Problem 1
Math › Geometry › Polygons
How to find the measure of one angle in a regular nonagon. 
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. 
Equiangular Polygon Sums  Problem 3
Math › Geometry › Polygons
How to find the measure of angles in regular polygons that share sides. 
Duplicating a Line Segment  Problem 2
Math › Geometry › Constructions
How to construct a triangle given three line segments. 
Duplicating a Line Segment  Problem 3
Math › Geometry › Constructions
How to construct an equilateral triangle given one segment.