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This page provides a list of educational videos related to Triangles geometry. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Triangles geometry.
Geometry -- Lesson 4.3 -- Congruent Triangles
By MisterRutter
This geometry lesson explains congruent triangles: triangles with the same measure sides and angles.
Introduction to Geometry - 15 - Congruent Triangles SSS, SAS
By thenewboston
YouTube presents Introduction to Geometry - 15 - Congruent Triangles SSS, SAS an educational video resources on math.
Geometry - Triangle Congruence - SSS SAS ASA postulate through constructions.wmv
By Soowook Lee
Geometry - Triangle Congruence - SSS SAS ASA postulate through constructions.wmv
Geometry - 10 - Proving Triangles are Similar
By thenewboston
Youtube Presents Geometry - 10 - Proving Triangles are Similar an educational video resources on math.
Geometry - 10 - Proving Triangles are Similar
By thenewboston
Youtube Presents Geometry - 10 - Proving Triangles are Similar an educational video resources on math.
Geometry - 10 - Proving Triangles are Similar
By thenewboston
Youtube Presents Geometry - 10 - Proving Triangles are Similar an educational video resources on math.
Special Right Triangles in Geometry: 45-45-90 and 30-60-90
By PatrickJMT
Special Right Triangles in Geometry: 45-45-90 and 30-60-90 degree triangles. In this video, I discuss two special right triangles, how to derive the formulas to find the lengths of the sides of the triangles by knowing the length of one side, and then do a few examples using them!
Similar Triangles - MathHelp.com - Geometry Help
By yourteachermathhelp
In this video, students will review the idea that the ratios of the lengths of corresponding sides of similar figures are equal. Students are shown how to use this idea to find missing segment lengths in similar figures.
Geometry construction construct an equilateral triangle
By Soowook Lee
Construct an equilateral triangle.
Geometry Tips : The History of Pascal's Triangle
By eHow
The history of Pascal's triangle begins with the Indians and the Persians who first started working on this pattern of numbers, and it developed through China in the 13th century hundreds of years before Pascal was even born.
Proving Triangles are Similar - YourTeacher.com - Geometry Help
By yourteachermathhelp
Students learn the following theorems related to similar triangles. If an angle of one triangle is congruent to an angle of another triangle, and the lengths of the sides that include each angle are in proportion, then the triangles are similar (Side-Angle-Side Similarity Theorem, or SAS Similarity Theorem). If the lengths of the sides of two triangles are in proportion, then the triangles are similar (Side-Side-Side Similarity Theorem, or SSS Similarity Theorem). Students are then asked to determine whether given triangles are similar based on these theorems.
Introduction to Geometry - 21 - Identifying Similar Triangles AA
By thenewboston
"AA" stands for "Angle-Angle." This means that if two triangles are known to have two corresponding angles that are equal in measure, then the two angles are similar.
Similar triangle basics | Similarity | Geometry | Khan Academy
By Khan Academy
Triangles are similar when all three of the corresponding angles are the same and the sides are simply "scaled-up" or "scaled-down" versions of each other.
Acute Triangle - YourTeacher.com - Geometry Help
By yourteachermathhelp
In this lesson students learn to classify triangles as acute (all angles acute) right (one angle right) or obtuse (one angle obtuse). Students also learn that the sum of the measures of the angles of a triangle is 180 degrees and students are asked to use this formula to find the measures of missing angles in given triangles.
Area of a Triangle - MathHelp.com - Geometry Help
By yourteachermathhelp
Students learn the formula for the area of a triangle and are asked to solve problems using this formula. Note that right triangle formulas and trigonometry are used extensively in the problems in this lesson.
Another Pythagorean theorem proof | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
Khan Academy presents Another Pythagorean Theorem Proof, an educational video resource on math.
Other triangle congruence postulates | Congruence | Geometry | Khan Academy
By Khan Academy
SSS, SAS, ASA and AAS postulates for congruent triangles. Showing AAA is only good for similarity and SSA is good for neither
Pythagorean theorem 2 | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
In this video, Sal Khan continues discussing the Pythagorean Theorem to solve for the third side of the triangle Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.
Pythagorean theorem 1 | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
This is a Khan Academy video about solving a word problem involving the need to find the length of a rope that attaches a mast of a boat with the deck of the boat.
Angle bisector theorem proof | Special properties and parts of triangles | Geometry | Khan Academy
By Khan Academy
In this video, we'll quickly review the angle bisector theorem, and then we'll see how it's proven. We prove it by extending a parallel line to one of the triangle's legs. That tells us information about the interior angles!