298 Videos for "triangles"

Remote Interior Angles  Problem 2
Math › Geometry › Triangles
How to solve for a remote interior angle given the exterior angle and the other remote interior angle. 
Remote Interior Angles  Problem 3
Math › Geometry › Triangles
How to solve for the measure of an exterior angle given formulas for the measures of the interior angles. 
Remote Interior Angles  Concept
Math › Geometry › Triangles
How to define exterior angles and their remote interior angles and how to prove their properties. 
Pythagorean Theorem Proofs  Problem 2
Math › Geometry › Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle. 
Pythagorean Theorem Proofs  Problem 2
Math › Trigonometry › Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle. 
Converse of the Pythagorean Theorem  Problem 2
Math › Trigonometry › Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle. 
Converse of the Pythagorean Theorem  Problem 2
Math › Geometry › Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle. 
Converse of the Pythagorean Theorem  Problem 1
Math › Trigonometry › Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle given the lengths of the triangle. 
Converse of the Pythagorean Theorem  Problem 1
Math › Geometry › Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle given the lengths of the triangle. 
Converse of the Pythagorean Theorem  Concept
Math › Geometry › 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. 
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  Concept
Math › Geometry › Similarity
How to prove two triangles are similar using a line parallel to a base. 
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. 
Pythagorean Theorem Proofs  Problem 1
Math › Trigonometry › 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  Problem 1
Math › Geometry › Pythagorean Theorem
How to prove the Pythagorean Theorem by rearranging triangles inside a square. 
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. 
Constructing Altitudes  Problem 2
Math › Geometry › Constructions
How to construct an altitude in an obtuse triangle.