Congruence | Geometry | Khan Academy (English)

   Monday, June 21, 2021   

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Congruence | Geometry | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Example of rigid transformation and congruence

Lecture 2: Problem involving angle derived from square and circle

Lecture 3: Equilateral and isosceles example problems

Lecture 4: Congruent legs and base angles of isosceles triangles

Lecture 5: Other triangle congruence postulates

Lecture 6: Congruent triangles and SSS

Lecture 7: Example involving an isosceles triangle and parallel lines

Lecture 8: Equilateral triangle sides and angles congruent

Lecture 9: Another congruence by transformation example

Lecture 10: Congruent triangle proof example

Lecture 11: SSS to show a radius is perpendicular to a chord that it bisects

Lecture 12: Testing congruence by transformations example

Lecture 13: Congruent triangle example 2

Lecture 14: Figuring out all the angles for congruent triangles example

Lecture 15: Another isosceles example problem

Lecture 16: Finding congruent triangles

Lecture 17: More on why SSA is not a postulate

Lecture 18: Two column proof showing segments are perpendicular

Lecture 19: Perpendicular radius bisects chord

Lecture 20: Another example of rigid transformations for congruence