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This page provides a list of educational videos related to Angle-Angle Similarity. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Angle-Angle Similarity.
Defining similarity through angle-preserving transformations
By Khan Academy
Sal is given pairs of polygons, and then he determines whether they are similar by trying to map one onto the other using angle-preserving transformations.
Exploring angle-preserving transformations and similarity
By Khan Academy
Sal is given pairs of polygons, and then he determines whether they are similar by trying to map one onto the other using angle-preserving transformations.
Defining similarity through angle-preserving transformations
By Khan Academy
Sal is given pairs of polygons, and then he determines whether they are similar by trying to map one onto the other using angle-preserving transformations.
Defining similarity through angle-preserving transformations
By Khan Academy
Sal is given pairs of polygons, and then he determines whether they are similar by trying to map one onto the other using angle-preserving transformations.
Triangle Similarity - AA SSS SAS & AAA Postulates, Proving Similar Triangles, Two Column Proofs
By The Organic Chemistry Tutor
This geometry video tutorial provides a basic introduction into triangle similarity. it explains how to use two column proofs in order to prove if two triangles are similar using the mostly the AA postulates. Other triangle similarity postulates mentioned are the AAA, SSS, and SAS postulates. Theorems used in this video include the base angle theorem, theorems associated with parallel lines, alternate interior angle theorem, vertical angles, reflexive property, definition of an altitude, right angle congruence, and more. This geometry video contains plenty of examples and practice problems on triangle similarity.
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.
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.
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.
How to Apply Postulate 13 to Similar Triangles
By Khan Academy
Video uses an electronic black board with different colored pens. This video is an introduction to similar triangles. The person discusses the meaning of the term similar then goes on to discuss similar triangles (they have all the same angles), and why they are considered similar (ratio of corresponding sides is the same). Video then gives examples to help students understand the terms used and how to find similar angles. Good quality video. Good for middle elementary and middle school students.
How to Apply Postulate 13 to Similar Triangles
By Khan Academy
Video uses an electronic black board with different colored pens. This video is an introduction to similar triangles. The person discusses the meaning of the term similar then goes on to discuss similar triangles (they have all the same angles), and why they are considered similar (ratio of corresponding sides is the same). Video then gives examples to help students understand the terms used and how to find similar angles. Good quality video. Good for middle elementary and middle school students.
Radian and degree | Unit circle definition of trig functions | Trigonometry | Khan Academy
By Khan Academy
This video explains what a radian is and how we determine the radian measure of an angle. The key point here is that the radian measure of an angle is the length of the arc (in radius lengths) cut off by that angle (if the angle's vertex is on the center of the circle). You may ask: Won't the size of the circle affect the radian measure of an angle? A key feature of circles is that they are all similar (and thus, proportional). When we account for their larger size, we take into account the larger radius. As a result, the radian measure is the same for all circles (since the radian measure is how many radius lengths long the arc is).
