269 Videos for "triangles"

Converse of the Pythagorean Theorem  Concept
Math › Trigonometry › Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle, how to use Pythagorean triples to memorize the lengths of certain right triangles. 
Proportional Segments Between Parallel Lines  Problem 1
Math › Geometry › Similarity
How to find a missing length in a triangle cut by a line parallel to a base. 
Proportional Segments Between Parallel Lines  Concept
Math › Geometry › Similarity
How to prove two triangles are similar using a line parallel to a base. 
Pythagorean Theorem Proofs  Problem 1
Math › Trigonometry › Pythagorean Theorem
How to prove the Pythagorean Theorem by rearranging triangles inside a square. 
Pythagorean Theorem Proofs  Problem 1
Math › Geometry › Pythagorean Theorem
How to prove the Pythagorean Theorem by rearranging triangles inside a square. 
Proportional Segments Between Parallel Lines  Problem 2
Math › Geometry › Similarity
How to find missing lengths created by two parallel lines passing through a triangle. 
Pythagorean Theorem Proofs  Concept
Math › Trigonometry › Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square. 
Pythagorean Theorem Proofs  Concept
Math › Geometry › Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square. 
Indirect Measurement  Concept
Math › Geometry › Similarity
How to use similar triangles to measure the height of objects. 
Indirect Measurement  Problem 1
Math › Geometry › Similarity
How to use a mirror and similar triangles to find the height of an object. 
Constructing Altitudes  Concept
Math › Geometry › Constructions
How to define an altitude and draw them on acute, right, and obtuse triangles. 
Similarity Shortcuts  Problem 1
Math › Geometry › Similarity
How to find a missing side of a triangle using the AA similarity shortcut. 
Constructing Altitudes  Problem 1
Math › Geometry › Constructions
How to construct an altitude in an acute triangle. 
Similarity Shortcuts  Concept
Math › Geometry › Similarity
How to determine if two triangles are similar using a shortcut. 
The Law of Sines  Problem 1
Math › Geometry › Basic Trigonometry
How to find the length of a triangle given two angles and a side, using the law of sines. 
Similarity Shortcuts  Problem 2
Math › Geometry › Similarity
How to find a missing side of a triangle using the SAS similarity shortcut. 
Constructing Altitudes  Problem 2
Math › Geometry › Constructions
How to construct an altitude in an obtuse triangle. 
Indirect Measurement  Problem 2
Math › Geometry › Similarity
How to use shadows and similar triangles to find the height of an object. 
The Law of Cosines  Problem 1
Math › Geometry › Basic Trigonometry
How to use the law of cosines to find a missing side in a triangle. 
Area of a Segment  Problem 2
Math › Geometry › Area
How to find the area of a segment, given a side in an equilateral triangle.