Lumos Video Store
This page provides a list of educational videos related to Proportions in Triangles. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Proportions in Triangles.
Solving Similar Triangles and Proportions
By MrCaryMath
YouTube presents Solving Similar Triangles and Proportions, an educational video resource on math.
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.
Pythagorean theorem proof using similarity | Geometry | Khan Academy
By Khan Academy
Watch this video to see a proof of the Pythagorean Theorem that uses properties of similar triangles. Remember, similar triangles have congruent angles (equal angles) and proportional corresponding sides.
Trigonometric Ratios of Special Angles
By AlRichards314
This video shows us how we determine the trigonometric ratios for the angles of 30 degrees, 45 degrees, and 60 degrees. Keep in mind that the ratios of the sides corresponding to these angles never change (even though the side lengths may change). That means that knowing the values for these trig ratios means you'll know them forever! They won't change!
Trigonometric functions and side ratios in right triangles
By Khan Academy
Sal is given a diagram with multiple right triangles and is asked to match different expressions with different trig values.
Trigonometric functions and side ratios in right triangles
By Khan Academy
Sal is given a diagram with multiple right triangles and is asked to verify identities relating to trig ratios in those triangles.
Trigonometric functions and side ratios in right triangles
By Khan Academy
Sal explains how the trigonometric ratios are derived from triangle similarity considerations.
Geometry Introduction - Basic Overview - Review For SAT, ACT, EOC, Midterm Final Exam
By The Organic Chemistry Tutor
8th Grade Math
By Lumos Learning
8th grade math lesson addressing Common Core Standards (Massachusetts Curriculum Framework Standard 8.EE.6).
8th Grade Math
By
8th grade math lesson addressing Common Core Standards (Massachusetts Curriculum Framework Standard 8.EE.6).
Hooke's Law and Elastic Potential Energy
By The Organic Chemistry Tutor
This video provides a basic introduction into Hooke's law. It explains how to calculate the elastic potential energy and how to determine the amount of work required to stretch a spring.