Special properties and parts of triangles | Geometry | Khan Academy (English)

   Saturday, June 19, 2021   

Starting a new Lecture Notes Series on Special properties and parts of triangles | Geometry | Khan Academy

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Special properties and parts of triangles | Geometry | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Incenter and incircles of a triangle

Lecture 2: Three points defining a circle

Lecture 3: Inradius, perimeter, and area

Lecture 4: Triangle medians and centroids

Lecture 5: Review of triangle properties

Lecture 6: Circumcenter of a triangle

Lecture 7: Angle bisector theorem examples

Lecture 8: Exploring medial triangles

Lecture 9: Angle bisector theorem proof

Lecture 10: Triangle medians and centroids (2D proof)

Lecture 11: Circumcenter of a right triangle

Lecture 12: Medians divide into smaller triangles of equal area

Lecture 13: Proof: Triangle altitudes are concurrent (orthocenter)

Lecture 14: Proving that the centroid is 2-3rds along the median

Lecture 15: 2003 AIME II problem 7 | AIME

Lecture 16: Median centroid right triangle example

Lecture 17: Common orthocenter and centroid

Lecture 18: Euler line

Lecture 19: Euler's line proof

Lecture 20: Area circumradius formula proof

Lecture 21: Point-line distance and angle bisectors